[1] Bryophytes are often called as amphibian plant because they :
A.
appear like frog
B.
are found both in water and on land
C.
do not have habitat preference
D.
can eat insects
Ans:
are found both in water and on land
Explanation :
Bryophytes are simple low growing plants, anchored to the ground or to tree bark by tiny filamentous rhizoids.
[2] DPT vaccine is administered to prevent diseases like:
A.
Diphtheria, Pertussis and Tetanus
B.
Dengue, Pertussis and Typhoid
C.
Dengue, Polio and Tetanus
D.
Diphtheria, Pertussis and Typhoid
Ans:
Diphtheria, Pertussis and Tetanus
Explanation :
DPI' refers to a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis (whooping cough) and tetanus. The vaccine components include diphtheria and tetanus toxoid, and killed whole cells of the organism that causes pertussis.
[3] Vitamin E is particularly important for -
A.
development of teeth
B.
carbohydrate metabolism
C.
normal activity of sex glands
D.
general health of epithelial tissues
Ans:
normal activity of sex glands
Explanation :
Vitamin E is a powerful antioxidant that helps improve circulation. Apart from sexual desire itself, circulation is the most important component of sexual function. Good bodily circulation is mandatory for a good sex life. A deficiency in vitamin E can cause anemia, or a low red blood cell count, which affects your body's ability to produce sex hormones that promote reproductive system function.
[4] Mushroom cultivation is not useful in -
A.
Biogas production
B.
Biological control of crop diseases
C.
Recycling of agricultural wastes
D.
Preventing cancer
Ans:
Biological control of crop diseases
Explanation :
Mushroom cultivation has been found to coincide with decrease of incidents of breast cancer. Spent residues after cultivation could be a better source of biologically pretreated substrates for biogas production; and agricultural waste recycling can be achieved through controlled cultivation of mushrooms.
[5] Blubber is -
A.
a milky secretion of rubber plant
B.
a layer of thick fat
C.
a device to trap insects by some aquatic
D.
fungal infection of rice plants
Ans:
a layer of thick fat
Explanation :
Blubber is a thick layer of vascularized adipose tissue found under the skin. Lipid-rich, collagen fiber- laced blubber comprises the hypodermis and covers the whole body, except for parts of the appendages, strongly attached to the musculature and skeleton by highly organized, fan-shaped networks of tendons and ligaments. It can comprise up to 50% of the body mass of some marine mammals during some points in their lives.
[6] Which of the following is correct?
A.
Osteology is the study of bones
B.
Philately is the study of coins
C.
Limnology is the study of oceans
D.
Ethology is the study of human races
Ans:
Osteology is the study of bones
Explanation :
A subdiscipline of anatomy, anthropology, and archaeology, osteology is a detailed study of the structure of bones, skeletal elements, teeth, microbone morphology, function, disease, pathology, the process of ossification (from cartilaginous molds), the resistance and hardness of bones (biophysics), etc.
[7] The main function of white blood cells in the body is to -
A.
carryoxygen
B.
help in clot formation
C.
produce more red cells
D.
protect body against diseases
Ans:
protect body against diseases
Explanation :
White blood cells, or leukocytes are cells of the immune system involved in defending the body against both infectious disease and-foreign materials. They are produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell. They live for about three to four days in the average human body. Leukocytes are found throughout the body, including the blood and lymphatic system.
[8] The expansion for AIDS is -
A.
Active Immuno Deficiency Syndrome
B.
Acquired Individual Disease Syndrome
C.
Acquired Immuno Deficiency Syndrome
D.
Acquired Immuno Disease Syndrome
Ans:
Acquired Immuno Deficiency Syndrome
Explanation :
Human immunodeficiency virus infection in acquired immunodeficiency syndrome (HIV/AIDS) is a disease of the human immune system caused by the human immunodeficiency virus (HIV). HW is transmitted primarily via unprotected sexual intercourse (including anal and even oral sex), contaminated blood transfusions and hypodermic needles, and from mother to child during pregnancy. delivery, or breastfeeding. There is no cure or vaccine; however, antiretroviral treatment can slow the course of the disease and may lead to a near-normal life expectancy.
[9] The orange colour of carrot is because of -
A.
it grows in the soil
B.
Carotene
C.
it is not exposed to sun-light
D.
the entire plant is orange in colour
Ans:
Carotene
Explanation :
The carrot gets its characteristic and bright orange colour from â-carotene, which is partly metabolised into vitamin A in humans. Carotene is responsible for the orange colour of carrots and many other fruits and vegetables. The term carotene (also carotin, from the Latin carota, or carrot) is used for several related unsaturated hydrocarbon substances having the formula C40Hx, which are synthesized by plants but cannot be made by animals. Carotene is an orange photosynthetic pigment important for photosynthesis. Carotenes are all coloured to the human eye. They are responsible for the colours of many other fruits and vegetables (for example, sweet potatoes and orange cantaloupe melon).
[10] Ginger is a stem and not a root because -
A.
It stores food material
B.
It grows horizontally in the soil
C.
It has nodes and internodes
D.
It lacks chlorophyll
Ans:
It has nodes and internodes
Explanation :
Ginger is a modified stem. A rhizome to be exact. A rhizome is a thick horizontally growing stem which usually stores food material. It has nodes and internodes, scale leaves, axillary buds, adventitous roots and a terminal bud. Scale leaves enclosing the axillary buds are seen arising from the nodal points of the stem. Some of the axillary buds develop into branches which grow upwards into the air and then produce normal green foliage leaves. Usually the growing points of the rhizome continue to remain underground causing an elongation of the rhizome. Roots develop from the lower surface of the rhizome. Eg. Ginger, Turmeric.
[11] Adherent mucoid alkaline substance covering the inner lining of stomach is to -
A.
digest starch
B.
act against bacteria
C.
prevent the action of pepsin of mucosa
D.
prevent viral infection
Ans:
prevent the action of pepsin of mucosa
Explanation :
The continuous adherent mucus layer is also a barrier to luminal pepsin, thereby protecting the underlying mucosa from photolytic digestion. The primary function of the adherent mucus gel layer is a structural one to create a stable, unstirred layer to support surface neutralization of acid and act as a protective physical barrier against luminal pepsin.
[12] Which of the following processes are associated with plants during dark period?
A.
Photosynthesis and respiration
B.
Respiration and transpiration
C.
Transpiration and conduction
D.
Conduction and respiration
Ans:
Conduction and respiration
Explanation :
Conduction is the process by which vital nutrients are transported to the different parts of a plant. This process is independent of the light factor. Respiration process in plants is the intake of carbon-dioxide and exhales oxygen during the day as the plants gets energy through the photosynthesis process in which the carbon-dioxide is converted into sugars using the sun light energy, as this process uses carbon-dioxide and water, the resulting gas oxygen is given out as a waste product. During the night, as the photosynthesis process cannot be happening without sun, so it exhales the carbon-dioxide itself.
[13] Two richest known sources of edible protein are -
A.
meat and eggs
B.
milk and vegetables
C.
soyabean and groundnut
D.
some type of algae and other micro-organisms
Ans:
soyabean and groundnut
Explanation :
The richest sources of protein are animal foods such as chicken, meat, fish, cheese and eggs. However, plant proteins are believed to be healthier because of their lower fat content.
[14] Reserpine is used to -
A.
reduce high blood pressure
B.
increase blood pressure when it is low
C.
alleviate pain
D.
cure arthritis
Ans:
reduce high blood pressure
Explanation :
Reserpine (Lannett’s Serpalan) is an indole alkaloid antipsychotic and antihypertensive drug that has been used for the control of high blood pressure. The antihypertensive actions of reserpine are a result of its ability to deplete catecholamines (among other monoamine neurotransmitters) from peripheral sympathetic nerve endings. These substances are normally involved in controlling heart rate, force of cardiac contraction and peripheral resistance.
[15] Vitamin E is particularly important for -
A.
development of teeth
B.
carbohydrate metabolism
C.
normal activity of sex glands
D.
general health of epithelial tissues
Ans:
normal activity of sex glands
Explanation :
Vitamin E is an antioxidant that protects body tissue from damage caused by substances called free radicals. Free radicals can harm cells, tissues, and organs. They are believed to play a role in certain conditions related to aging. The body also needs vitamin E to help keep the immune system strong against viruses and bacteria. Vitamin E is also important in the formation of red blood cells and it helps the body use vitamin K. It also helps widen blood vessels and keep blood from clotting inside them.
[16] What happens to a person who receives the wrong type of blood?
A.
All the arteries constrict
B.
All the arteries dialates
C.
The RBCs agglutinate
D.
The spleen and lymphnodes deteriorate
Ans:
The RBCs agglutinate
Explanation :
Red blood cell agglutination indicates clumping of RBC’s due to cold agglutinins which are most commonly IgM antibodies. These antibodies crosslink red cells, which causes overlapping (arrow) and loss of central pallor. The agglutination leads to reduction in red cell count, elevation in MCH and MCV as measured by automated instruments. Hemagglutination is when the particles involved are red blood cells. The agglutin is called hemagglutinin. In cross-matching, agglutination occurring when donor red blood cells and recipient’s serum or plasma are incubated together indicates that the donor blood is incompatible for that particular recipient.
[17] Maximum photosynthetic activity occurs in -
A.
blue and red region of light
B.
green and yellow region of light
C.
blue and orange region of light
D.
violet and orange region of light
Ans:
blue and red region of light
Explanation :
Wavelength of light between 400 nm and 700 nm is most effective for photosynthesis. This light is called photo synthetically active radiation (PAR). Comparatively more photosynthesis occurs is red and blue regions though others have significant net photosynthesis. Light has maximum efficiency in red and minimum in blue region. In both these regions light is absorbed by chlorophylls.
[18] Radioimmunoassay (RIA) is a therapy used -
A.
to cure lung cancer
B.
to cure AIDS
C.
to cure fractures in bones
D.
to detect antibodies and hormones present in the blood samples
Ans:
to detect antibodies and hormones present in the blood samples
Explanation :
Radioimmunoassay (RIA) is a very sensitive in vitro assay technique used to measure concentrations of antigens (for example, hormone levels in the blood) by use of antibodies. As such, it can be seen as the inverse of a radio binding assay, which quantifies an antibody by use of corresponding antigens. Although the RIA technique is extremely sensitive and extremely specific, requiring specialized equipment, it remains the least expensive method to perform such tests. It requires special precautions and licensing, since radioactive substances are used. Today it has been supplanted by the ELISA method.
[19] Fat soluble vitamins are -
A.
Tocopherol, Niacin, Cyanocobalamin
B.
Calciferol, Carotene, Tocopherol
C.
Ascorbic acid, Calciferol, Riboflavin
D.
Thiamine, Carotene, Biotin
Ans:
Calciferol, Carotene, Tocopherol
Explanation :
Calciferol (Vitamin D): Tocopherols and tocotrienols (Vitamin E); Phylloquinone, menaquinones (Vitamin K); and Retinol, retinal, and four carotenoids including beta carotene (Vitamin Al are all fat soluble vitamins.
[20] What is "ALZHEIMER'S" disease?
A.
It is a disorder of the brain
B.
It affects liver
C.
It affects kidney
D.
It affects human immune system
Ans:
It is a disorder of the brain
Explanation :
Alzheimer's disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities, including memory and reasoning, which become severe enough to impede social or occupational functioning. Alzheimer's disease is also known as simply Senile Dementia.
[21] Grey hair is caused due to -
A.
aging of epidermal cells
B.
death of dermal cells
C.
loss of sebum in epidermal cells
D.
loss of melanin in epidermal cells
Ans:
loss of melanin in epidermal cells
Explanation :
0
[22] Stomatal opening is based on -
A.
Exosrnosis
B.
Endosmosis
C.
Plasmolysis in guard cells
D.
Decrease in concentration of cell sap
Ans:
Endosmosis
Explanation :
According to the K+ ion theory the guard cells absorb K+ ions from the cells around them as they produce ATP (due to photosynthesis) and become hypertonic. This leads to absorption of water from nearby cells by endosmosis due to which the guard cells become turgid and the stomata opens. Decreasing light intensity and photosynthesis causes Stomatal closing.
[23] Optics is the study of:
A.
Nature and properties of light
B.
Old age, its phenomenon, disease etc
C.
Disease of the nervous system
D.
Symbolic representations
Ans:
Nature and properties of light
Explanation :
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter. Optics usually describes the behavior of visible, ultraviolet, and infrared light.
[24] Bakeries use yeast in bread-making because it -
A.
makes the bread hard
B.
makes the bread soft and spongy
C.
enhances the food values
D.
keeps the bread fresh
Ans:
makes the bread soft and spongy
Explanation :
Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
[25] The elements known as primary nutrients for plants
A.
Nitrogen, Phosphorus and Potassium
B.
Nitrogen, Oxygen and Silicon
C.
Potassium, Boron and Nitrogen
D.
Nitrogen, Phosphorus and Iron
Ans:
Nitrogen, Phosphorus and Potassium
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements
Explanation :
Bryophytes are simple low growing plants, anchored to the ground or to tree bark by tiny filamentous rhizoids.
[2] DPT vaccine is administered to prevent diseases like:
A.
Diphtheria, Pertussis and Tetanus
B.
Dengue, Pertussis and Typhoid
C.
Dengue, Polio and Tetanus
D.
Diphtheria, Pertussis and Typhoid
Ans:
Diphtheria, Pertussis and Tetanus
Explanation :
DPI' refers to a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis (whooping cough) and tetanus. The vaccine components include diphtheria and tetanus toxoid, and killed whole cells of the organism that causes pertussis.
[3] Vitamin E is particularly important for -
A.
development of teeth
B.
carbohydrate metabolism
C.
normal activity of sex glands
D.
general health of epithelial tissues
Ans:
normal activity of sex glands
Explanation :
Vitamin E is a powerful antioxidant that helps improve circulation. Apart from sexual desire itself, circulation is the most important component of sexual function. Good bodily circulation is mandatory for a good sex life. A deficiency in vitamin E can cause anemia, or a low red blood cell count, which affects your body's ability to produce sex hormones that promote reproductive system function.
[4] Mushroom cultivation is not useful in -
A.
Biogas production
B.
Biological control of crop diseases
C.
Recycling of agricultural wastes
D.
Preventing cancer
Ans:
Biological control of crop diseases
Explanation :
Mushroom cultivation has been found to coincide with decrease of incidents of breast cancer. Spent residues after cultivation could be a better source of biologically pretreated substrates for biogas production; and agricultural waste recycling can be achieved through controlled cultivation of mushrooms.
[5] Blubber is -
A.
a milky secretion of rubber plant
B.
a layer of thick fat
C.
a device to trap insects by some aquatic
D.
fungal infection of rice plants
Ans:
a layer of thick fat
Explanation :
Blubber is a thick layer of vascularized adipose tissue found under the skin. Lipid-rich, collagen fiber- laced blubber comprises the hypodermis and covers the whole body, except for parts of the appendages, strongly attached to the musculature and skeleton by highly organized, fan-shaped networks of tendons and ligaments. It can comprise up to 50% of the body mass of some marine mammals during some points in their lives.
[6] Which of the following is correct?
A.
Osteology is the study of bones
B.
Philately is the study of coins
C.
Limnology is the study of oceans
D.
Ethology is the study of human races
Ans:
Osteology is the study of bones
Explanation :
A subdiscipline of anatomy, anthropology, and archaeology, osteology is a detailed study of the structure of bones, skeletal elements, teeth, microbone morphology, function, disease, pathology, the process of ossification (from cartilaginous molds), the resistance and hardness of bones (biophysics), etc.
[7] The main function of white blood cells in the body is to -
A.
carryoxygen
B.
help in clot formation
C.
produce more red cells
D.
protect body against diseases
Ans:
protect body against diseases
Explanation :
White blood cells, or leukocytes are cells of the immune system involved in defending the body against both infectious disease and-foreign materials. They are produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell. They live for about three to four days in the average human body. Leukocytes are found throughout the body, including the blood and lymphatic system.
[8] The expansion for AIDS is -
A.
Active Immuno Deficiency Syndrome
B.
Acquired Individual Disease Syndrome
C.
Acquired Immuno Deficiency Syndrome
D.
Acquired Immuno Disease Syndrome
Ans:
Acquired Immuno Deficiency Syndrome
Explanation :
Human immunodeficiency virus infection in acquired immunodeficiency syndrome (HIV/AIDS) is a disease of the human immune system caused by the human immunodeficiency virus (HIV). HW is transmitted primarily via unprotected sexual intercourse (including anal and even oral sex), contaminated blood transfusions and hypodermic needles, and from mother to child during pregnancy. delivery, or breastfeeding. There is no cure or vaccine; however, antiretroviral treatment can slow the course of the disease and may lead to a near-normal life expectancy.
[9] The orange colour of carrot is because of -
A.
it grows in the soil
B.
Carotene
C.
it is not exposed to sun-light
D.
the entire plant is orange in colour
Ans:
Carotene
Explanation :
The carrot gets its characteristic and bright orange colour from â-carotene, which is partly metabolised into vitamin A in humans. Carotene is responsible for the orange colour of carrots and many other fruits and vegetables. The term carotene (also carotin, from the Latin carota, or carrot) is used for several related unsaturated hydrocarbon substances having the formula C40Hx, which are synthesized by plants but cannot be made by animals. Carotene is an orange photosynthetic pigment important for photosynthesis. Carotenes are all coloured to the human eye. They are responsible for the colours of many other fruits and vegetables (for example, sweet potatoes and orange cantaloupe melon).
[10] Ginger is a stem and not a root because -
A.
It stores food material
B.
It grows horizontally in the soil
C.
It has nodes and internodes
D.
It lacks chlorophyll
Ans:
It has nodes and internodes
Explanation :
Ginger is a modified stem. A rhizome to be exact. A rhizome is a thick horizontally growing stem which usually stores food material. It has nodes and internodes, scale leaves, axillary buds, adventitous roots and a terminal bud. Scale leaves enclosing the axillary buds are seen arising from the nodal points of the stem. Some of the axillary buds develop into branches which grow upwards into the air and then produce normal green foliage leaves. Usually the growing points of the rhizome continue to remain underground causing an elongation of the rhizome. Roots develop from the lower surface of the rhizome. Eg. Ginger, Turmeric.
[11] Adherent mucoid alkaline substance covering the inner lining of stomach is to -
A.
digest starch
B.
act against bacteria
C.
prevent the action of pepsin of mucosa
D.
prevent viral infection
Ans:
prevent the action of pepsin of mucosa
Explanation :
The continuous adherent mucus layer is also a barrier to luminal pepsin, thereby protecting the underlying mucosa from photolytic digestion. The primary function of the adherent mucus gel layer is a structural one to create a stable, unstirred layer to support surface neutralization of acid and act as a protective physical barrier against luminal pepsin.
[12] Which of the following processes are associated with plants during dark period?
A.
Photosynthesis and respiration
B.
Respiration and transpiration
C.
Transpiration and conduction
D.
Conduction and respiration
Ans:
Conduction and respiration
Explanation :
Conduction is the process by which vital nutrients are transported to the different parts of a plant. This process is independent of the light factor. Respiration process in plants is the intake of carbon-dioxide and exhales oxygen during the day as the plants gets energy through the photosynthesis process in which the carbon-dioxide is converted into sugars using the sun light energy, as this process uses carbon-dioxide and water, the resulting gas oxygen is given out as a waste product. During the night, as the photosynthesis process cannot be happening without sun, so it exhales the carbon-dioxide itself.
[13] Two richest known sources of edible protein are -
A.
meat and eggs
B.
milk and vegetables
C.
soyabean and groundnut
D.
some type of algae and other micro-organisms
Ans:
soyabean and groundnut
Explanation :
The richest sources of protein are animal foods such as chicken, meat, fish, cheese and eggs. However, plant proteins are believed to be healthier because of their lower fat content.
[14] Reserpine is used to -
A.
reduce high blood pressure
B.
increase blood pressure when it is low
C.
alleviate pain
D.
cure arthritis
Ans:
reduce high blood pressure
Explanation :
Reserpine (Lannett’s Serpalan) is an indole alkaloid antipsychotic and antihypertensive drug that has been used for the control of high blood pressure. The antihypertensive actions of reserpine are a result of its ability to deplete catecholamines (among other monoamine neurotransmitters) from peripheral sympathetic nerve endings. These substances are normally involved in controlling heart rate, force of cardiac contraction and peripheral resistance.
[15] Vitamin E is particularly important for -
A.
development of teeth
B.
carbohydrate metabolism
C.
normal activity of sex glands
D.
general health of epithelial tissues
Ans:
normal activity of sex glands
Explanation :
Vitamin E is an antioxidant that protects body tissue from damage caused by substances called free radicals. Free radicals can harm cells, tissues, and organs. They are believed to play a role in certain conditions related to aging. The body also needs vitamin E to help keep the immune system strong against viruses and bacteria. Vitamin E is also important in the formation of red blood cells and it helps the body use vitamin K. It also helps widen blood vessels and keep blood from clotting inside them.
[16] What happens to a person who receives the wrong type of blood?
A.
All the arteries constrict
B.
All the arteries dialates
C.
The RBCs agglutinate
D.
The spleen and lymphnodes deteriorate
Ans:
The RBCs agglutinate
Explanation :
Red blood cell agglutination indicates clumping of RBC’s due to cold agglutinins which are most commonly IgM antibodies. These antibodies crosslink red cells, which causes overlapping (arrow) and loss of central pallor. The agglutination leads to reduction in red cell count, elevation in MCH and MCV as measured by automated instruments. Hemagglutination is when the particles involved are red blood cells. The agglutin is called hemagglutinin. In cross-matching, agglutination occurring when donor red blood cells and recipient’s serum or plasma are incubated together indicates that the donor blood is incompatible for that particular recipient.
[17] Maximum photosynthetic activity occurs in -
A.
blue and red region of light
B.
green and yellow region of light
C.
blue and orange region of light
D.
violet and orange region of light
Ans:
blue and red region of light
Explanation :
Wavelength of light between 400 nm and 700 nm is most effective for photosynthesis. This light is called photo synthetically active radiation (PAR). Comparatively more photosynthesis occurs is red and blue regions though others have significant net photosynthesis. Light has maximum efficiency in red and minimum in blue region. In both these regions light is absorbed by chlorophylls.
[18] Radioimmunoassay (RIA) is a therapy used -
A.
to cure lung cancer
B.
to cure AIDS
C.
to cure fractures in bones
D.
to detect antibodies and hormones present in the blood samples
Ans:
to detect antibodies and hormones present in the blood samples
Explanation :
Radioimmunoassay (RIA) is a very sensitive in vitro assay technique used to measure concentrations of antigens (for example, hormone levels in the blood) by use of antibodies. As such, it can be seen as the inverse of a radio binding assay, which quantifies an antibody by use of corresponding antigens. Although the RIA technique is extremely sensitive and extremely specific, requiring specialized equipment, it remains the least expensive method to perform such tests. It requires special precautions and licensing, since radioactive substances are used. Today it has been supplanted by the ELISA method.
[19] Fat soluble vitamins are -
A.
Tocopherol, Niacin, Cyanocobalamin
B.
Calciferol, Carotene, Tocopherol
C.
Ascorbic acid, Calciferol, Riboflavin
D.
Thiamine, Carotene, Biotin
Ans:
Calciferol, Carotene, Tocopherol
Explanation :
Calciferol (Vitamin D): Tocopherols and tocotrienols (Vitamin E); Phylloquinone, menaquinones (Vitamin K); and Retinol, retinal, and four carotenoids including beta carotene (Vitamin Al are all fat soluble vitamins.
[20] What is "ALZHEIMER'S" disease?
A.
It is a disorder of the brain
B.
It affects liver
C.
It affects kidney
D.
It affects human immune system
Ans:
It is a disorder of the brain
Explanation :
Alzheimer's disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities, including memory and reasoning, which become severe enough to impede social or occupational functioning. Alzheimer's disease is also known as simply Senile Dementia.
[21] Grey hair is caused due to -
A.
aging of epidermal cells
B.
death of dermal cells
C.
loss of sebum in epidermal cells
D.
loss of melanin in epidermal cells
Ans:
loss of melanin in epidermal cells
Explanation :
0
[22] Stomatal opening is based on -
A.
Exosrnosis
B.
Endosmosis
C.
Plasmolysis in guard cells
D.
Decrease in concentration of cell sap
Ans:
Endosmosis
Explanation :
According to the K+ ion theory the guard cells absorb K+ ions from the cells around them as they produce ATP (due to photosynthesis) and become hypertonic. This leads to absorption of water from nearby cells by endosmosis due to which the guard cells become turgid and the stomata opens. Decreasing light intensity and photosynthesis causes Stomatal closing.
[23] Optics is the study of:
A.
Nature and properties of light
B.
Old age, its phenomenon, disease etc
C.
Disease of the nervous system
D.
Symbolic representations
Ans:
Nature and properties of light
Explanation :
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter. Optics usually describes the behavior of visible, ultraviolet, and infrared light.
[24] Bakeries use yeast in bread-making because it -
A.
makes the bread hard
B.
makes the bread soft and spongy
C.
enhances the food values
D.
keeps the bread fresh
Ans:
makes the bread soft and spongy
Explanation :
Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
[25] The elements known as primary nutrients for plants
A.
Nitrogen, Phosphorus and Potassium
B.
Nitrogen, Oxygen and Silicon
C.
Potassium, Boron and Nitrogen
D.
Nitrogen, Phosphorus and Iron
Ans:
Nitrogen, Phosphorus and Potassium
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements
Explanation :
Vitamin E is a powerful antioxidant that helps improve circulation. Apart from sexual desire itself, circulation is the most important component of sexual function. Good bodily circulation is mandatory for a good sex life. A deficiency in vitamin E can cause anemia, or a low red blood cell count, which affects your body's ability to produce sex hormones that promote reproductive system function.
[4] Mushroom cultivation is not useful in -
A.
Biogas production
B.
Biological control of crop diseases
C.
Recycling of agricultural wastes
D.
Preventing cancer
Ans:
Biological control of crop diseases
Explanation :
Mushroom cultivation has been found to coincide with decrease of incidents of breast cancer. Spent residues after cultivation could be a better source of biologically pretreated substrates for biogas production; and agricultural waste recycling can be achieved through controlled cultivation of mushrooms.
[5] Blubber is -
A.
a milky secretion of rubber plant
B.
a layer of thick fat
C.
a device to trap insects by some aquatic
D.
fungal infection of rice plants
Ans:
a layer of thick fat
Explanation :
Blubber is a thick layer of vascularized adipose tissue found under the skin. Lipid-rich, collagen fiber- laced blubber comprises the hypodermis and covers the whole body, except for parts of the appendages, strongly attached to the musculature and skeleton by highly organized, fan-shaped networks of tendons and ligaments. It can comprise up to 50% of the body mass of some marine mammals during some points in their lives.
[6] Which of the following is correct?
A.
Osteology is the study of bones
B.
Philately is the study of coins
C.
Limnology is the study of oceans
D.
Ethology is the study of human races
Ans:
Osteology is the study of bones
Explanation :
A subdiscipline of anatomy, anthropology, and archaeology, osteology is a detailed study of the structure of bones, skeletal elements, teeth, microbone morphology, function, disease, pathology, the process of ossification (from cartilaginous molds), the resistance and hardness of bones (biophysics), etc.
[7] The main function of white blood cells in the body is to -
A.
carryoxygen
B.
help in clot formation
C.
produce more red cells
D.
protect body against diseases
Ans:
protect body against diseases
Explanation :
White blood cells, or leukocytes are cells of the immune system involved in defending the body against both infectious disease and-foreign materials. They are produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell. They live for about three to four days in the average human body. Leukocytes are found throughout the body, including the blood and lymphatic system.
[8] The expansion for AIDS is -
A.
Active Immuno Deficiency Syndrome
B.
Acquired Individual Disease Syndrome
C.
Acquired Immuno Deficiency Syndrome
D.
Acquired Immuno Disease Syndrome
Ans:
Acquired Immuno Deficiency Syndrome
Explanation :
Human immunodeficiency virus infection in acquired immunodeficiency syndrome (HIV/AIDS) is a disease of the human immune system caused by the human immunodeficiency virus (HIV). HW is transmitted primarily via unprotected sexual intercourse (including anal and even oral sex), contaminated blood transfusions and hypodermic needles, and from mother to child during pregnancy. delivery, or breastfeeding. There is no cure or vaccine; however, antiretroviral treatment can slow the course of the disease and may lead to a near-normal life expectancy.
[9] The orange colour of carrot is because of -
A.
it grows in the soil
B.
Carotene
C.
it is not exposed to sun-light
D.
the entire plant is orange in colour
Ans:
Carotene
Explanation :
The carrot gets its characteristic and bright orange colour from â-carotene, which is partly metabolised into vitamin A in humans. Carotene is responsible for the orange colour of carrots and many other fruits and vegetables. The term carotene (also carotin, from the Latin carota, or carrot) is used for several related unsaturated hydrocarbon substances having the formula C40Hx, which are synthesized by plants but cannot be made by animals. Carotene is an orange photosynthetic pigment important for photosynthesis. Carotenes are all coloured to the human eye. They are responsible for the colours of many other fruits and vegetables (for example, sweet potatoes and orange cantaloupe melon).
[10] Ginger is a stem and not a root because -
A.
It stores food material
B.
It grows horizontally in the soil
C.
It has nodes and internodes
D.
It lacks chlorophyll
Ans:
It has nodes and internodes
Explanation :
Ginger is a modified stem. A rhizome to be exact. A rhizome is a thick horizontally growing stem which usually stores food material. It has nodes and internodes, scale leaves, axillary buds, adventitous roots and a terminal bud. Scale leaves enclosing the axillary buds are seen arising from the nodal points of the stem. Some of the axillary buds develop into branches which grow upwards into the air and then produce normal green foliage leaves. Usually the growing points of the rhizome continue to remain underground causing an elongation of the rhizome. Roots develop from the lower surface of the rhizome. Eg. Ginger, Turmeric.
[11] Adherent mucoid alkaline substance covering the inner lining of stomach is to -
A.
digest starch
B.
act against bacteria
C.
prevent the action of pepsin of mucosa
D.
prevent viral infection
Ans:
prevent the action of pepsin of mucosa
Explanation :
The continuous adherent mucus layer is also a barrier to luminal pepsin, thereby protecting the underlying mucosa from photolytic digestion. The primary function of the adherent mucus gel layer is a structural one to create a stable, unstirred layer to support surface neutralization of acid and act as a protective physical barrier against luminal pepsin.
[12] Which of the following processes are associated with plants during dark period?
A.
Photosynthesis and respiration
B.
Respiration and transpiration
C.
Transpiration and conduction
D.
Conduction and respiration
Ans:
Conduction and respiration
Explanation :
Conduction is the process by which vital nutrients are transported to the different parts of a plant. This process is independent of the light factor. Respiration process in plants is the intake of carbon-dioxide and exhales oxygen during the day as the plants gets energy through the photosynthesis process in which the carbon-dioxide is converted into sugars using the sun light energy, as this process uses carbon-dioxide and water, the resulting gas oxygen is given out as a waste product. During the night, as the photosynthesis process cannot be happening without sun, so it exhales the carbon-dioxide itself.
[13] Two richest known sources of edible protein are -
A.
meat and eggs
B.
milk and vegetables
C.
soyabean and groundnut
D.
some type of algae and other micro-organisms
Ans:
soyabean and groundnut
Explanation :
The richest sources of protein are animal foods such as chicken, meat, fish, cheese and eggs. However, plant proteins are believed to be healthier because of their lower fat content.
[14] Reserpine is used to -
A.
reduce high blood pressure
B.
increase blood pressure when it is low
C.
alleviate pain
D.
cure arthritis
Ans:
reduce high blood pressure
Explanation :
Reserpine (Lannett’s Serpalan) is an indole alkaloid antipsychotic and antihypertensive drug that has been used for the control of high blood pressure. The antihypertensive actions of reserpine are a result of its ability to deplete catecholamines (among other monoamine neurotransmitters) from peripheral sympathetic nerve endings. These substances are normally involved in controlling heart rate, force of cardiac contraction and peripheral resistance.
[15] Vitamin E is particularly important for -
A.
development of teeth
B.
carbohydrate metabolism
C.
normal activity of sex glands
D.
general health of epithelial tissues
Ans:
normal activity of sex glands
Explanation :
Vitamin E is an antioxidant that protects body tissue from damage caused by substances called free radicals. Free radicals can harm cells, tissues, and organs. They are believed to play a role in certain conditions related to aging. The body also needs vitamin E to help keep the immune system strong against viruses and bacteria. Vitamin E is also important in the formation of red blood cells and it helps the body use vitamin K. It also helps widen blood vessels and keep blood from clotting inside them.
[16] What happens to a person who receives the wrong type of blood?
A.
All the arteries constrict
B.
All the arteries dialates
C.
The RBCs agglutinate
D.
The spleen and lymphnodes deteriorate
Ans:
The RBCs agglutinate
Explanation :
Red blood cell agglutination indicates clumping of RBC’s due to cold agglutinins which are most commonly IgM antibodies. These antibodies crosslink red cells, which causes overlapping (arrow) and loss of central pallor. The agglutination leads to reduction in red cell count, elevation in MCH and MCV as measured by automated instruments. Hemagglutination is when the particles involved are red blood cells. The agglutin is called hemagglutinin. In cross-matching, agglutination occurring when donor red blood cells and recipient’s serum or plasma are incubated together indicates that the donor blood is incompatible for that particular recipient.
[17] Maximum photosynthetic activity occurs in -
A.
blue and red region of light
B.
green and yellow region of light
C.
blue and orange region of light
D.
violet and orange region of light
Ans:
blue and red region of light
Explanation :
Wavelength of light between 400 nm and 700 nm is most effective for photosynthesis. This light is called photo synthetically active radiation (PAR). Comparatively more photosynthesis occurs is red and blue regions though others have significant net photosynthesis. Light has maximum efficiency in red and minimum in blue region. In both these regions light is absorbed by chlorophylls.
[18] Radioimmunoassay (RIA) is a therapy used -
A.
to cure lung cancer
B.
to cure AIDS
C.
to cure fractures in bones
D.
to detect antibodies and hormones present in the blood samples
Ans:
to detect antibodies and hormones present in the blood samples
Explanation :
Radioimmunoassay (RIA) is a very sensitive in vitro assay technique used to measure concentrations of antigens (for example, hormone levels in the blood) by use of antibodies. As such, it can be seen as the inverse of a radio binding assay, which quantifies an antibody by use of corresponding antigens. Although the RIA technique is extremely sensitive and extremely specific, requiring specialized equipment, it remains the least expensive method to perform such tests. It requires special precautions and licensing, since radioactive substances are used. Today it has been supplanted by the ELISA method.
[19] Fat soluble vitamins are -
A.
Tocopherol, Niacin, Cyanocobalamin
B.
Calciferol, Carotene, Tocopherol
C.
Ascorbic acid, Calciferol, Riboflavin
D.
Thiamine, Carotene, Biotin
Ans:
Calciferol, Carotene, Tocopherol
Explanation :
Calciferol (Vitamin D): Tocopherols and tocotrienols (Vitamin E); Phylloquinone, menaquinones (Vitamin K); and Retinol, retinal, and four carotenoids including beta carotene (Vitamin Al are all fat soluble vitamins.
[20] What is "ALZHEIMER'S" disease?
A.
It is a disorder of the brain
B.
It affects liver
C.
It affects kidney
D.
It affects human immune system
Ans:
It is a disorder of the brain
Explanation :
Alzheimer's disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities, including memory and reasoning, which become severe enough to impede social or occupational functioning. Alzheimer's disease is also known as simply Senile Dementia.
[21] Grey hair is caused due to -
A.
aging of epidermal cells
B.
death of dermal cells
C.
loss of sebum in epidermal cells
D.
loss of melanin in epidermal cells
Ans:
loss of melanin in epidermal cells
Explanation :
0
[22] Stomatal opening is based on -
A.
Exosrnosis
B.
Endosmosis
C.
Plasmolysis in guard cells
D.
Decrease in concentration of cell sap
Ans:
Endosmosis
Explanation :
According to the K+ ion theory the guard cells absorb K+ ions from the cells around them as they produce ATP (due to photosynthesis) and become hypertonic. This leads to absorption of water from nearby cells by endosmosis due to which the guard cells become turgid and the stomata opens. Decreasing light intensity and photosynthesis causes Stomatal closing.
[23] Optics is the study of:
A.
Nature and properties of light
B.
Old age, its phenomenon, disease etc
C.
Disease of the nervous system
D.
Symbolic representations
Ans:
Nature and properties of light
Explanation :
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter. Optics usually describes the behavior of visible, ultraviolet, and infrared light.
[24] Bakeries use yeast in bread-making because it -
A.
makes the bread hard
B.
makes the bread soft and spongy
C.
enhances the food values
D.
keeps the bread fresh
Ans:
makes the bread soft and spongy
Explanation :
Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
[25] The elements known as primary nutrients for plants
A.
Nitrogen, Phosphorus and Potassium
B.
Nitrogen, Oxygen and Silicon
C.
Potassium, Boron and Nitrogen
D.
Nitrogen, Phosphorus and Iron
Ans:
Nitrogen, Phosphorus and Potassium
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements
Explanation :
Blubber is a thick layer of vascularized adipose tissue found under the skin. Lipid-rich, collagen fiber- laced blubber comprises the hypodermis and covers the whole body, except for parts of the appendages, strongly attached to the musculature and skeleton by highly organized, fan-shaped networks of tendons and ligaments. It can comprise up to 50% of the body mass of some marine mammals during some points in their lives.
[6] Which of the following is correct?
A.
Osteology is the study of bones
B.
Philately is the study of coins
C.
Limnology is the study of oceans
D.
Ethology is the study of human races
Ans:
Osteology is the study of bones
Explanation :
A subdiscipline of anatomy, anthropology, and archaeology, osteology is a detailed study of the structure of bones, skeletal elements, teeth, microbone morphology, function, disease, pathology, the process of ossification (from cartilaginous molds), the resistance and hardness of bones (biophysics), etc.
[7] The main function of white blood cells in the body is to -
A.
carryoxygen
B.
help in clot formation
C.
produce more red cells
D.
protect body against diseases
Ans:
protect body against diseases
Explanation :
White blood cells, or leukocytes are cells of the immune system involved in defending the body against both infectious disease and-foreign materials. They are produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell. They live for about three to four days in the average human body. Leukocytes are found throughout the body, including the blood and lymphatic system.
[8] The expansion for AIDS is -
A.
Active Immuno Deficiency Syndrome
B.
Acquired Individual Disease Syndrome
C.
Acquired Immuno Deficiency Syndrome
D.
Acquired Immuno Disease Syndrome
Ans:
Acquired Immuno Deficiency Syndrome
Explanation :
Human immunodeficiency virus infection in acquired immunodeficiency syndrome (HIV/AIDS) is a disease of the human immune system caused by the human immunodeficiency virus (HIV). HW is transmitted primarily via unprotected sexual intercourse (including anal and even oral sex), contaminated blood transfusions and hypodermic needles, and from mother to child during pregnancy. delivery, or breastfeeding. There is no cure or vaccine; however, antiretroviral treatment can slow the course of the disease and may lead to a near-normal life expectancy.
[9] The orange colour of carrot is because of -
A.
it grows in the soil
B.
Carotene
C.
it is not exposed to sun-light
D.
the entire plant is orange in colour
Ans:
Carotene
Explanation :
The carrot gets its characteristic and bright orange colour from â-carotene, which is partly metabolised into vitamin A in humans. Carotene is responsible for the orange colour of carrots and many other fruits and vegetables. The term carotene (also carotin, from the Latin carota, or carrot) is used for several related unsaturated hydrocarbon substances having the formula C40Hx, which are synthesized by plants but cannot be made by animals. Carotene is an orange photosynthetic pigment important for photosynthesis. Carotenes are all coloured to the human eye. They are responsible for the colours of many other fruits and vegetables (for example, sweet potatoes and orange cantaloupe melon).
[10] Ginger is a stem and not a root because -
A.
It stores food material
B.
It grows horizontally in the soil
C.
It has nodes and internodes
D.
It lacks chlorophyll
Ans:
It has nodes and internodes
Explanation :
Ginger is a modified stem. A rhizome to be exact. A rhizome is a thick horizontally growing stem which usually stores food material. It has nodes and internodes, scale leaves, axillary buds, adventitous roots and a terminal bud. Scale leaves enclosing the axillary buds are seen arising from the nodal points of the stem. Some of the axillary buds develop into branches which grow upwards into the air and then produce normal green foliage leaves. Usually the growing points of the rhizome continue to remain underground causing an elongation of the rhizome. Roots develop from the lower surface of the rhizome. Eg. Ginger, Turmeric.
[11] Adherent mucoid alkaline substance covering the inner lining of stomach is to -
A.
digest starch
B.
act against bacteria
C.
prevent the action of pepsin of mucosa
D.
prevent viral infection
Ans:
prevent the action of pepsin of mucosa
Explanation :
The continuous adherent mucus layer is also a barrier to luminal pepsin, thereby protecting the underlying mucosa from photolytic digestion. The primary function of the adherent mucus gel layer is a structural one to create a stable, unstirred layer to support surface neutralization of acid and act as a protective physical barrier against luminal pepsin.
[12] Which of the following processes are associated with plants during dark period?
A.
Photosynthesis and respiration
B.
Respiration and transpiration
C.
Transpiration and conduction
D.
Conduction and respiration
Ans:
Conduction and respiration
Explanation :
Conduction is the process by which vital nutrients are transported to the different parts of a plant. This process is independent of the light factor. Respiration process in plants is the intake of carbon-dioxide and exhales oxygen during the day as the plants gets energy through the photosynthesis process in which the carbon-dioxide is converted into sugars using the sun light energy, as this process uses carbon-dioxide and water, the resulting gas oxygen is given out as a waste product. During the night, as the photosynthesis process cannot be happening without sun, so it exhales the carbon-dioxide itself.
[13] Two richest known sources of edible protein are -
A.
meat and eggs
B.
milk and vegetables
C.
soyabean and groundnut
D.
some type of algae and other micro-organisms
Ans:
soyabean and groundnut
Explanation :
The richest sources of protein are animal foods such as chicken, meat, fish, cheese and eggs. However, plant proteins are believed to be healthier because of their lower fat content.
[14] Reserpine is used to -
A.
reduce high blood pressure
B.
increase blood pressure when it is low
C.
alleviate pain
D.
cure arthritis
Ans:
reduce high blood pressure
Explanation :
Reserpine (Lannett’s Serpalan) is an indole alkaloid antipsychotic and antihypertensive drug that has been used for the control of high blood pressure. The antihypertensive actions of reserpine are a result of its ability to deplete catecholamines (among other monoamine neurotransmitters) from peripheral sympathetic nerve endings. These substances are normally involved in controlling heart rate, force of cardiac contraction and peripheral resistance.
[15] Vitamin E is particularly important for -
A.
development of teeth
B.
carbohydrate metabolism
C.
normal activity of sex glands
D.
general health of epithelial tissues
Ans:
normal activity of sex glands
Explanation :
Vitamin E is an antioxidant that protects body tissue from damage caused by substances called free radicals. Free radicals can harm cells, tissues, and organs. They are believed to play a role in certain conditions related to aging. The body also needs vitamin E to help keep the immune system strong against viruses and bacteria. Vitamin E is also important in the formation of red blood cells and it helps the body use vitamin K. It also helps widen blood vessels and keep blood from clotting inside them.
[16] What happens to a person who receives the wrong type of blood?
A.
All the arteries constrict
B.
All the arteries dialates
C.
The RBCs agglutinate
D.
The spleen and lymphnodes deteriorate
Ans:
The RBCs agglutinate
Explanation :
Red blood cell agglutination indicates clumping of RBC’s due to cold agglutinins which are most commonly IgM antibodies. These antibodies crosslink red cells, which causes overlapping (arrow) and loss of central pallor. The agglutination leads to reduction in red cell count, elevation in MCH and MCV as measured by automated instruments. Hemagglutination is when the particles involved are red blood cells. The agglutin is called hemagglutinin. In cross-matching, agglutination occurring when donor red blood cells and recipient’s serum or plasma are incubated together indicates that the donor blood is incompatible for that particular recipient.
[17] Maximum photosynthetic activity occurs in -
A.
blue and red region of light
B.
green and yellow region of light
C.
blue and orange region of light
D.
violet and orange region of light
Ans:
blue and red region of light
Explanation :
Wavelength of light between 400 nm and 700 nm is most effective for photosynthesis. This light is called photo synthetically active radiation (PAR). Comparatively more photosynthesis occurs is red and blue regions though others have significant net photosynthesis. Light has maximum efficiency in red and minimum in blue region. In both these regions light is absorbed by chlorophylls.
[18] Radioimmunoassay (RIA) is a therapy used -
A.
to cure lung cancer
B.
to cure AIDS
C.
to cure fractures in bones
D.
to detect antibodies and hormones present in the blood samples
Ans:
to detect antibodies and hormones present in the blood samples
Explanation :
Radioimmunoassay (RIA) is a very sensitive in vitro assay technique used to measure concentrations of antigens (for example, hormone levels in the blood) by use of antibodies. As such, it can be seen as the inverse of a radio binding assay, which quantifies an antibody by use of corresponding antigens. Although the RIA technique is extremely sensitive and extremely specific, requiring specialized equipment, it remains the least expensive method to perform such tests. It requires special precautions and licensing, since radioactive substances are used. Today it has been supplanted by the ELISA method.
[19] Fat soluble vitamins are -
A.
Tocopherol, Niacin, Cyanocobalamin
B.
Calciferol, Carotene, Tocopherol
C.
Ascorbic acid, Calciferol, Riboflavin
D.
Thiamine, Carotene, Biotin
Ans:
Calciferol, Carotene, Tocopherol
Explanation :
Calciferol (Vitamin D): Tocopherols and tocotrienols (Vitamin E); Phylloquinone, menaquinones (Vitamin K); and Retinol, retinal, and four carotenoids including beta carotene (Vitamin Al are all fat soluble vitamins.
[20] What is "ALZHEIMER'S" disease?
A.
It is a disorder of the brain
B.
It affects liver
C.
It affects kidney
D.
It affects human immune system
Ans:
It is a disorder of the brain
Explanation :
Alzheimer's disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities, including memory and reasoning, which become severe enough to impede social or occupational functioning. Alzheimer's disease is also known as simply Senile Dementia.
[21] Grey hair is caused due to -
A.
aging of epidermal cells
B.
death of dermal cells
C.
loss of sebum in epidermal cells
D.
loss of melanin in epidermal cells
Ans:
loss of melanin in epidermal cells
Explanation :
0
[22] Stomatal opening is based on -
A.
Exosrnosis
B.
Endosmosis
C.
Plasmolysis in guard cells
D.
Decrease in concentration of cell sap
Ans:
Endosmosis
Explanation :
According to the K+ ion theory the guard cells absorb K+ ions from the cells around them as they produce ATP (due to photosynthesis) and become hypertonic. This leads to absorption of water from nearby cells by endosmosis due to which the guard cells become turgid and the stomata opens. Decreasing light intensity and photosynthesis causes Stomatal closing.
[23] Optics is the study of:
A.
Nature and properties of light
B.
Old age, its phenomenon, disease etc
C.
Disease of the nervous system
D.
Symbolic representations
Ans:
Nature and properties of light
Explanation :
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter. Optics usually describes the behavior of visible, ultraviolet, and infrared light.
[24] Bakeries use yeast in bread-making because it -
A.
makes the bread hard
B.
makes the bread soft and spongy
C.
enhances the food values
D.
keeps the bread fresh
Ans:
makes the bread soft and spongy
Explanation :
Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
[25] The elements known as primary nutrients for plants
A.
Nitrogen, Phosphorus and Potassium
B.
Nitrogen, Oxygen and Silicon
C.
Potassium, Boron and Nitrogen
D.
Nitrogen, Phosphorus and Iron
Ans:
Nitrogen, Phosphorus and Potassium
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements
Explanation :
White blood cells, or leukocytes are cells of the immune system involved in defending the body against both infectious disease and-foreign materials. They are produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell. They live for about three to four days in the average human body. Leukocytes are found throughout the body, including the blood and lymphatic system.
[8] The expansion for AIDS is -
A.
Active Immuno Deficiency Syndrome
B.
Acquired Individual Disease Syndrome
C.
Acquired Immuno Deficiency Syndrome
D.
Acquired Immuno Disease Syndrome
Ans:
Acquired Immuno Deficiency Syndrome
Explanation :
Human immunodeficiency virus infection in acquired immunodeficiency syndrome (HIV/AIDS) is a disease of the human immune system caused by the human immunodeficiency virus (HIV). HW is transmitted primarily via unprotected sexual intercourse (including anal and even oral sex), contaminated blood transfusions and hypodermic needles, and from mother to child during pregnancy. delivery, or breastfeeding. There is no cure or vaccine; however, antiretroviral treatment can slow the course of the disease and may lead to a near-normal life expectancy.
[9] The orange colour of carrot is because of -
A.
it grows in the soil
B.
Carotene
C.
it is not exposed to sun-light
D.
the entire plant is orange in colour
Ans:
Carotene
Explanation :
The carrot gets its characteristic and bright orange colour from â-carotene, which is partly metabolised into vitamin A in humans. Carotene is responsible for the orange colour of carrots and many other fruits and vegetables. The term carotene (also carotin, from the Latin carota, or carrot) is used for several related unsaturated hydrocarbon substances having the formula C40Hx, which are synthesized by plants but cannot be made by animals. Carotene is an orange photosynthetic pigment important for photosynthesis. Carotenes are all coloured to the human eye. They are responsible for the colours of many other fruits and vegetables (for example, sweet potatoes and orange cantaloupe melon).
[10] Ginger is a stem and not a root because -
A.
It stores food material
B.
It grows horizontally in the soil
C.
It has nodes and internodes
D.
It lacks chlorophyll
Ans:
It has nodes and internodes
Explanation :
Ginger is a modified stem. A rhizome to be exact. A rhizome is a thick horizontally growing stem which usually stores food material. It has nodes and internodes, scale leaves, axillary buds, adventitous roots and a terminal bud. Scale leaves enclosing the axillary buds are seen arising from the nodal points of the stem. Some of the axillary buds develop into branches which grow upwards into the air and then produce normal green foliage leaves. Usually the growing points of the rhizome continue to remain underground causing an elongation of the rhizome. Roots develop from the lower surface of the rhizome. Eg. Ginger, Turmeric.
[11] Adherent mucoid alkaline substance covering the inner lining of stomach is to -
A.
digest starch
B.
act against bacteria
C.
prevent the action of pepsin of mucosa
D.
prevent viral infection
Ans:
prevent the action of pepsin of mucosa
Explanation :
The continuous adherent mucus layer is also a barrier to luminal pepsin, thereby protecting the underlying mucosa from photolytic digestion. The primary function of the adherent mucus gel layer is a structural one to create a stable, unstirred layer to support surface neutralization of acid and act as a protective physical barrier against luminal pepsin.
[12] Which of the following processes are associated with plants during dark period?
A.
Photosynthesis and respiration
B.
Respiration and transpiration
C.
Transpiration and conduction
D.
Conduction and respiration
Ans:
Conduction and respiration
Explanation :
Conduction is the process by which vital nutrients are transported to the different parts of a plant. This process is independent of the light factor. Respiration process in plants is the intake of carbon-dioxide and exhales oxygen during the day as the plants gets energy through the photosynthesis process in which the carbon-dioxide is converted into sugars using the sun light energy, as this process uses carbon-dioxide and water, the resulting gas oxygen is given out as a waste product. During the night, as the photosynthesis process cannot be happening without sun, so it exhales the carbon-dioxide itself.
[13] Two richest known sources of edible protein are -
A.
meat and eggs
B.
milk and vegetables
C.
soyabean and groundnut
D.
some type of algae and other micro-organisms
Ans:
soyabean and groundnut
Explanation :
The richest sources of protein are animal foods such as chicken, meat, fish, cheese and eggs. However, plant proteins are believed to be healthier because of their lower fat content.
[14] Reserpine is used to -
A.
reduce high blood pressure
B.
increase blood pressure when it is low
C.
alleviate pain
D.
cure arthritis
Ans:
reduce high blood pressure
Explanation :
Reserpine (Lannett’s Serpalan) is an indole alkaloid antipsychotic and antihypertensive drug that has been used for the control of high blood pressure. The antihypertensive actions of reserpine are a result of its ability to deplete catecholamines (among other monoamine neurotransmitters) from peripheral sympathetic nerve endings. These substances are normally involved in controlling heart rate, force of cardiac contraction and peripheral resistance.
[15] Vitamin E is particularly important for -
A.
development of teeth
B.
carbohydrate metabolism
C.
normal activity of sex glands
D.
general health of epithelial tissues
Ans:
normal activity of sex glands
Explanation :
Vitamin E is an antioxidant that protects body tissue from damage caused by substances called free radicals. Free radicals can harm cells, tissues, and organs. They are believed to play a role in certain conditions related to aging. The body also needs vitamin E to help keep the immune system strong against viruses and bacteria. Vitamin E is also important in the formation of red blood cells and it helps the body use vitamin K. It also helps widen blood vessels and keep blood from clotting inside them.
[16] What happens to a person who receives the wrong type of blood?
A.
All the arteries constrict
B.
All the arteries dialates
C.
The RBCs agglutinate
D.
The spleen and lymphnodes deteriorate
Ans:
The RBCs agglutinate
Explanation :
Red blood cell agglutination indicates clumping of RBC’s due to cold agglutinins which are most commonly IgM antibodies. These antibodies crosslink red cells, which causes overlapping (arrow) and loss of central pallor. The agglutination leads to reduction in red cell count, elevation in MCH and MCV as measured by automated instruments. Hemagglutination is when the particles involved are red blood cells. The agglutin is called hemagglutinin. In cross-matching, agglutination occurring when donor red blood cells and recipient’s serum or plasma are incubated together indicates that the donor blood is incompatible for that particular recipient.
[17] Maximum photosynthetic activity occurs in -
A.
blue and red region of light
B.
green and yellow region of light
C.
blue and orange region of light
D.
violet and orange region of light
Ans:
blue and red region of light
Explanation :
Wavelength of light between 400 nm and 700 nm is most effective for photosynthesis. This light is called photo synthetically active radiation (PAR). Comparatively more photosynthesis occurs is red and blue regions though others have significant net photosynthesis. Light has maximum efficiency in red and minimum in blue region. In both these regions light is absorbed by chlorophylls.
[18] Radioimmunoassay (RIA) is a therapy used -
A.
to cure lung cancer
B.
to cure AIDS
C.
to cure fractures in bones
D.
to detect antibodies and hormones present in the blood samples
Ans:
to detect antibodies and hormones present in the blood samples
Explanation :
Radioimmunoassay (RIA) is a very sensitive in vitro assay technique used to measure concentrations of antigens (for example, hormone levels in the blood) by use of antibodies. As such, it can be seen as the inverse of a radio binding assay, which quantifies an antibody by use of corresponding antigens. Although the RIA technique is extremely sensitive and extremely specific, requiring specialized equipment, it remains the least expensive method to perform such tests. It requires special precautions and licensing, since radioactive substances are used. Today it has been supplanted by the ELISA method.
[19] Fat soluble vitamins are -
A.
Tocopherol, Niacin, Cyanocobalamin
B.
Calciferol, Carotene, Tocopherol
C.
Ascorbic acid, Calciferol, Riboflavin
D.
Thiamine, Carotene, Biotin
Ans:
Calciferol, Carotene, Tocopherol
Explanation :
Calciferol (Vitamin D): Tocopherols and tocotrienols (Vitamin E); Phylloquinone, menaquinones (Vitamin K); and Retinol, retinal, and four carotenoids including beta carotene (Vitamin Al are all fat soluble vitamins.
[20] What is "ALZHEIMER'S" disease?
A.
It is a disorder of the brain
B.
It affects liver
C.
It affects kidney
D.
It affects human immune system
Ans:
It is a disorder of the brain
Explanation :
Alzheimer's disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities, including memory and reasoning, which become severe enough to impede social or occupational functioning. Alzheimer's disease is also known as simply Senile Dementia.
[21] Grey hair is caused due to -
A.
aging of epidermal cells
B.
death of dermal cells
C.
loss of sebum in epidermal cells
D.
loss of melanin in epidermal cells
Ans:
loss of melanin in epidermal cells
Explanation :
0
[22] Stomatal opening is based on -
A.
Exosrnosis
B.
Endosmosis
C.
Plasmolysis in guard cells
D.
Decrease in concentration of cell sap
Ans:
Endosmosis
Explanation :
According to the K+ ion theory the guard cells absorb K+ ions from the cells around them as they produce ATP (due to photosynthesis) and become hypertonic. This leads to absorption of water from nearby cells by endosmosis due to which the guard cells become turgid and the stomata opens. Decreasing light intensity and photosynthesis causes Stomatal closing.
[23] Optics is the study of:
A.
Nature and properties of light
B.
Old age, its phenomenon, disease etc
C.
Disease of the nervous system
D.
Symbolic representations
Ans:
Nature and properties of light
Explanation :
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter. Optics usually describes the behavior of visible, ultraviolet, and infrared light.
[24] Bakeries use yeast in bread-making because it -
A.
makes the bread hard
B.
makes the bread soft and spongy
C.
enhances the food values
D.
keeps the bread fresh
Ans:
makes the bread soft and spongy
Explanation :
Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
[25] The elements known as primary nutrients for plants
A.
Nitrogen, Phosphorus and Potassium
B.
Nitrogen, Oxygen and Silicon
C.
Potassium, Boron and Nitrogen
D.
Nitrogen, Phosphorus and Iron
Ans:
Nitrogen, Phosphorus and Potassium
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements
Explanation :
The carrot gets its characteristic and bright orange colour from â-carotene, which is partly metabolised into vitamin A in humans. Carotene is responsible for the orange colour of carrots and many other fruits and vegetables. The term carotene (also carotin, from the Latin carota, or carrot) is used for several related unsaturated hydrocarbon substances having the formula C40Hx, which are synthesized by plants but cannot be made by animals. Carotene is an orange photosynthetic pigment important for photosynthesis. Carotenes are all coloured to the human eye. They are responsible for the colours of many other fruits and vegetables (for example, sweet potatoes and orange cantaloupe melon).
[10] Ginger is a stem and not a root because -
A.
It stores food material
B.
It grows horizontally in the soil
C.
It has nodes and internodes
D.
It lacks chlorophyll
Ans:
It has nodes and internodes
Explanation :
Ginger is a modified stem. A rhizome to be exact. A rhizome is a thick horizontally growing stem which usually stores food material. It has nodes and internodes, scale leaves, axillary buds, adventitous roots and a terminal bud. Scale leaves enclosing the axillary buds are seen arising from the nodal points of the stem. Some of the axillary buds develop into branches which grow upwards into the air and then produce normal green foliage leaves. Usually the growing points of the rhizome continue to remain underground causing an elongation of the rhizome. Roots develop from the lower surface of the rhizome. Eg. Ginger, Turmeric.
[11] Adherent mucoid alkaline substance covering the inner lining of stomach is to -
A.
digest starch
B.
act against bacteria
C.
prevent the action of pepsin of mucosa
D.
prevent viral infection
Ans:
prevent the action of pepsin of mucosa
Explanation :
The continuous adherent mucus layer is also a barrier to luminal pepsin, thereby protecting the underlying mucosa from photolytic digestion. The primary function of the adherent mucus gel layer is a structural one to create a stable, unstirred layer to support surface neutralization of acid and act as a protective physical barrier against luminal pepsin.
[12] Which of the following processes are associated with plants during dark period?
A.
Photosynthesis and respiration
B.
Respiration and transpiration
C.
Transpiration and conduction
D.
Conduction and respiration
Ans:
Conduction and respiration
Explanation :
Conduction is the process by which vital nutrients are transported to the different parts of a plant. This process is independent of the light factor. Respiration process in plants is the intake of carbon-dioxide and exhales oxygen during the day as the plants gets energy through the photosynthesis process in which the carbon-dioxide is converted into sugars using the sun light energy, as this process uses carbon-dioxide and water, the resulting gas oxygen is given out as a waste product. During the night, as the photosynthesis process cannot be happening without sun, so it exhales the carbon-dioxide itself.
[13] Two richest known sources of edible protein are -
A.
meat and eggs
B.
milk and vegetables
C.
soyabean and groundnut
D.
some type of algae and other micro-organisms
Ans:
soyabean and groundnut
Explanation :
The richest sources of protein are animal foods such as chicken, meat, fish, cheese and eggs. However, plant proteins are believed to be healthier because of their lower fat content.
[14] Reserpine is used to -
A.
reduce high blood pressure
B.
increase blood pressure when it is low
C.
alleviate pain
D.
cure arthritis
Ans:
reduce high blood pressure
Explanation :
Reserpine (Lannett’s Serpalan) is an indole alkaloid antipsychotic and antihypertensive drug that has been used for the control of high blood pressure. The antihypertensive actions of reserpine are a result of its ability to deplete catecholamines (among other monoamine neurotransmitters) from peripheral sympathetic nerve endings. These substances are normally involved in controlling heart rate, force of cardiac contraction and peripheral resistance.
[15] Vitamin E is particularly important for -
A.
development of teeth
B.
carbohydrate metabolism
C.
normal activity of sex glands
D.
general health of epithelial tissues
Ans:
normal activity of sex glands
Explanation :
Vitamin E is an antioxidant that protects body tissue from damage caused by substances called free radicals. Free radicals can harm cells, tissues, and organs. They are believed to play a role in certain conditions related to aging. The body also needs vitamin E to help keep the immune system strong against viruses and bacteria. Vitamin E is also important in the formation of red blood cells and it helps the body use vitamin K. It also helps widen blood vessels and keep blood from clotting inside them.
[16] What happens to a person who receives the wrong type of blood?
A.
All the arteries constrict
B.
All the arteries dialates
C.
The RBCs agglutinate
D.
The spleen and lymphnodes deteriorate
Ans:
The RBCs agglutinate
Explanation :
Red blood cell agglutination indicates clumping of RBC’s due to cold agglutinins which are most commonly IgM antibodies. These antibodies crosslink red cells, which causes overlapping (arrow) and loss of central pallor. The agglutination leads to reduction in red cell count, elevation in MCH and MCV as measured by automated instruments. Hemagglutination is when the particles involved are red blood cells. The agglutin is called hemagglutinin. In cross-matching, agglutination occurring when donor red blood cells and recipient’s serum or plasma are incubated together indicates that the donor blood is incompatible for that particular recipient.
[17] Maximum photosynthetic activity occurs in -
A.
blue and red region of light
B.
green and yellow region of light
C.
blue and orange region of light
D.
violet and orange region of light
Ans:
blue and red region of light
Explanation :
Wavelength of light between 400 nm and 700 nm is most effective for photosynthesis. This light is called photo synthetically active radiation (PAR). Comparatively more photosynthesis occurs is red and blue regions though others have significant net photosynthesis. Light has maximum efficiency in red and minimum in blue region. In both these regions light is absorbed by chlorophylls.
[18] Radioimmunoassay (RIA) is a therapy used -
A.
to cure lung cancer
B.
to cure AIDS
C.
to cure fractures in bones
D.
to detect antibodies and hormones present in the blood samples
Ans:
to detect antibodies and hormones present in the blood samples
Explanation :
Radioimmunoassay (RIA) is a very sensitive in vitro assay technique used to measure concentrations of antigens (for example, hormone levels in the blood) by use of antibodies. As such, it can be seen as the inverse of a radio binding assay, which quantifies an antibody by use of corresponding antigens. Although the RIA technique is extremely sensitive and extremely specific, requiring specialized equipment, it remains the least expensive method to perform such tests. It requires special precautions and licensing, since radioactive substances are used. Today it has been supplanted by the ELISA method.
[19] Fat soluble vitamins are -
A.
Tocopherol, Niacin, Cyanocobalamin
B.
Calciferol, Carotene, Tocopherol
C.
Ascorbic acid, Calciferol, Riboflavin
D.
Thiamine, Carotene, Biotin
Ans:
Calciferol, Carotene, Tocopherol
Explanation :
Calciferol (Vitamin D): Tocopherols and tocotrienols (Vitamin E); Phylloquinone, menaquinones (Vitamin K); and Retinol, retinal, and four carotenoids including beta carotene (Vitamin Al are all fat soluble vitamins.
[20] What is "ALZHEIMER'S" disease?
A.
It is a disorder of the brain
B.
It affects liver
C.
It affects kidney
D.
It affects human immune system
Ans:
It is a disorder of the brain
Explanation :
Alzheimer's disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities, including memory and reasoning, which become severe enough to impede social or occupational functioning. Alzheimer's disease is also known as simply Senile Dementia.
[21] Grey hair is caused due to -
A.
aging of epidermal cells
B.
death of dermal cells
C.
loss of sebum in epidermal cells
D.
loss of melanin in epidermal cells
Ans:
loss of melanin in epidermal cells
Explanation :
0
[22] Stomatal opening is based on -
A.
Exosrnosis
B.
Endosmosis
C.
Plasmolysis in guard cells
D.
Decrease in concentration of cell sap
Ans:
Endosmosis
Explanation :
According to the K+ ion theory the guard cells absorb K+ ions from the cells around them as they produce ATP (due to photosynthesis) and become hypertonic. This leads to absorption of water from nearby cells by endosmosis due to which the guard cells become turgid and the stomata opens. Decreasing light intensity and photosynthesis causes Stomatal closing.
[23] Optics is the study of:
A.
Nature and properties of light
B.
Old age, its phenomenon, disease etc
C.
Disease of the nervous system
D.
Symbolic representations
Ans:
Nature and properties of light
Explanation :
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter. Optics usually describes the behavior of visible, ultraviolet, and infrared light.
[24] Bakeries use yeast in bread-making because it -
A.
makes the bread hard
B.
makes the bread soft and spongy
C.
enhances the food values
D.
keeps the bread fresh
Ans:
makes the bread soft and spongy
Explanation :
Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
[25] The elements known as primary nutrients for plants
A.
Nitrogen, Phosphorus and Potassium
B.
Nitrogen, Oxygen and Silicon
C.
Potassium, Boron and Nitrogen
D.
Nitrogen, Phosphorus and Iron
Ans:
Nitrogen, Phosphorus and Potassium
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements
Explanation :
The continuous adherent mucus layer is also a barrier to luminal pepsin, thereby protecting the underlying mucosa from photolytic digestion. The primary function of the adherent mucus gel layer is a structural one to create a stable, unstirred layer to support surface neutralization of acid and act as a protective physical barrier against luminal pepsin.
[12] Which of the following processes are associated with plants during dark period?
A.
Photosynthesis and respiration
B.
Respiration and transpiration
C.
Transpiration and conduction
D.
Conduction and respiration
Ans:
Conduction and respiration
Explanation :
Conduction is the process by which vital nutrients are transported to the different parts of a plant. This process is independent of the light factor. Respiration process in plants is the intake of carbon-dioxide and exhales oxygen during the day as the plants gets energy through the photosynthesis process in which the carbon-dioxide is converted into sugars using the sun light energy, as this process uses carbon-dioxide and water, the resulting gas oxygen is given out as a waste product. During the night, as the photosynthesis process cannot be happening without sun, so it exhales the carbon-dioxide itself.
[13] Two richest known sources of edible protein are -
A.
meat and eggs
B.
milk and vegetables
C.
soyabean and groundnut
D.
some type of algae and other micro-organisms
Ans:
soyabean and groundnut
Explanation :
The richest sources of protein are animal foods such as chicken, meat, fish, cheese and eggs. However, plant proteins are believed to be healthier because of their lower fat content.
[14] Reserpine is used to -
A.
reduce high blood pressure
B.
increase blood pressure when it is low
C.
alleviate pain
D.
cure arthritis
Ans:
reduce high blood pressure
Explanation :
Reserpine (Lannett’s Serpalan) is an indole alkaloid antipsychotic and antihypertensive drug that has been used for the control of high blood pressure. The antihypertensive actions of reserpine are a result of its ability to deplete catecholamines (among other monoamine neurotransmitters) from peripheral sympathetic nerve endings. These substances are normally involved in controlling heart rate, force of cardiac contraction and peripheral resistance.
[15] Vitamin E is particularly important for -
A.
development of teeth
B.
carbohydrate metabolism
C.
normal activity of sex glands
D.
general health of epithelial tissues
Ans:
normal activity of sex glands
Explanation :
Vitamin E is an antioxidant that protects body tissue from damage caused by substances called free radicals. Free radicals can harm cells, tissues, and organs. They are believed to play a role in certain conditions related to aging. The body also needs vitamin E to help keep the immune system strong against viruses and bacteria. Vitamin E is also important in the formation of red blood cells and it helps the body use vitamin K. It also helps widen blood vessels and keep blood from clotting inside them.
[16] What happens to a person who receives the wrong type of blood?
A.
All the arteries constrict
B.
All the arteries dialates
C.
The RBCs agglutinate
D.
The spleen and lymphnodes deteriorate
Ans:
The RBCs agglutinate
Explanation :
Red blood cell agglutination indicates clumping of RBC’s due to cold agglutinins which are most commonly IgM antibodies. These antibodies crosslink red cells, which causes overlapping (arrow) and loss of central pallor. The agglutination leads to reduction in red cell count, elevation in MCH and MCV as measured by automated instruments. Hemagglutination is when the particles involved are red blood cells. The agglutin is called hemagglutinin. In cross-matching, agglutination occurring when donor red blood cells and recipient’s serum or plasma are incubated together indicates that the donor blood is incompatible for that particular recipient.
[17] Maximum photosynthetic activity occurs in -
A.
blue and red region of light
B.
green and yellow region of light
C.
blue and orange region of light
D.
violet and orange region of light
Ans:
blue and red region of light
Explanation :
Wavelength of light between 400 nm and 700 nm is most effective for photosynthesis. This light is called photo synthetically active radiation (PAR). Comparatively more photosynthesis occurs is red and blue regions though others have significant net photosynthesis. Light has maximum efficiency in red and minimum in blue region. In both these regions light is absorbed by chlorophylls.
[18] Radioimmunoassay (RIA) is a therapy used -
A.
to cure lung cancer
B.
to cure AIDS
C.
to cure fractures in bones
D.
to detect antibodies and hormones present in the blood samples
Ans:
to detect antibodies and hormones present in the blood samples
Explanation :
Radioimmunoassay (RIA) is a very sensitive in vitro assay technique used to measure concentrations of antigens (for example, hormone levels in the blood) by use of antibodies. As such, it can be seen as the inverse of a radio binding assay, which quantifies an antibody by use of corresponding antigens. Although the RIA technique is extremely sensitive and extremely specific, requiring specialized equipment, it remains the least expensive method to perform such tests. It requires special precautions and licensing, since radioactive substances are used. Today it has been supplanted by the ELISA method.
[19] Fat soluble vitamins are -
A.
Tocopherol, Niacin, Cyanocobalamin
B.
Calciferol, Carotene, Tocopherol
C.
Ascorbic acid, Calciferol, Riboflavin
D.
Thiamine, Carotene, Biotin
Ans:
Calciferol, Carotene, Tocopherol
Explanation :
Calciferol (Vitamin D): Tocopherols and tocotrienols (Vitamin E); Phylloquinone, menaquinones (Vitamin K); and Retinol, retinal, and four carotenoids including beta carotene (Vitamin Al are all fat soluble vitamins.
[20] What is "ALZHEIMER'S" disease?
A.
It is a disorder of the brain
B.
It affects liver
C.
It affects kidney
D.
It affects human immune system
Ans:
It is a disorder of the brain
Explanation :
Alzheimer's disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities, including memory and reasoning, which become severe enough to impede social or occupational functioning. Alzheimer's disease is also known as simply Senile Dementia.
[21] Grey hair is caused due to -
A.
aging of epidermal cells
B.
death of dermal cells
C.
loss of sebum in epidermal cells
D.
loss of melanin in epidermal cells
Ans:
loss of melanin in epidermal cells
Explanation :
0
[22] Stomatal opening is based on -
A.
Exosrnosis
B.
Endosmosis
C.
Plasmolysis in guard cells
D.
Decrease in concentration of cell sap
Ans:
Endosmosis
Explanation :
According to the K+ ion theory the guard cells absorb K+ ions from the cells around them as they produce ATP (due to photosynthesis) and become hypertonic. This leads to absorption of water from nearby cells by endosmosis due to which the guard cells become turgid and the stomata opens. Decreasing light intensity and photosynthesis causes Stomatal closing.
[23] Optics is the study of:
A.
Nature and properties of light
B.
Old age, its phenomenon, disease etc
C.
Disease of the nervous system
D.
Symbolic representations
Ans:
Nature and properties of light
Explanation :
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter. Optics usually describes the behavior of visible, ultraviolet, and infrared light.
[24] Bakeries use yeast in bread-making because it -
A.
makes the bread hard
B.
makes the bread soft and spongy
C.
enhances the food values
D.
keeps the bread fresh
Ans:
makes the bread soft and spongy
Explanation :
Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
[25] The elements known as primary nutrients for plants
A.
Nitrogen, Phosphorus and Potassium
B.
Nitrogen, Oxygen and Silicon
C.
Potassium, Boron and Nitrogen
D.
Nitrogen, Phosphorus and Iron
Ans:
Nitrogen, Phosphorus and Potassium
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements
Explanation :
The richest sources of protein are animal foods such as chicken, meat, fish, cheese and eggs. However, plant proteins are believed to be healthier because of their lower fat content.
[14] Reserpine is used to -
A.
reduce high blood pressure
B.
increase blood pressure when it is low
C.
alleviate pain
D.
cure arthritis
Ans:
reduce high blood pressure
Explanation :
Reserpine (Lannett’s Serpalan) is an indole alkaloid antipsychotic and antihypertensive drug that has been used for the control of high blood pressure. The antihypertensive actions of reserpine are a result of its ability to deplete catecholamines (among other monoamine neurotransmitters) from peripheral sympathetic nerve endings. These substances are normally involved in controlling heart rate, force of cardiac contraction and peripheral resistance.
[15] Vitamin E is particularly important for -
A.
development of teeth
B.
carbohydrate metabolism
C.
normal activity of sex glands
D.
general health of epithelial tissues
Ans:
normal activity of sex glands
Explanation :
Vitamin E is an antioxidant that protects body tissue from damage caused by substances called free radicals. Free radicals can harm cells, tissues, and organs. They are believed to play a role in certain conditions related to aging. The body also needs vitamin E to help keep the immune system strong against viruses and bacteria. Vitamin E is also important in the formation of red blood cells and it helps the body use vitamin K. It also helps widen blood vessels and keep blood from clotting inside them.
[16] What happens to a person who receives the wrong type of blood?
A.
All the arteries constrict
B.
All the arteries dialates
C.
The RBCs agglutinate
D.
The spleen and lymphnodes deteriorate
Ans:
The RBCs agglutinate
Explanation :
Red blood cell agglutination indicates clumping of RBC’s due to cold agglutinins which are most commonly IgM antibodies. These antibodies crosslink red cells, which causes overlapping (arrow) and loss of central pallor. The agglutination leads to reduction in red cell count, elevation in MCH and MCV as measured by automated instruments. Hemagglutination is when the particles involved are red blood cells. The agglutin is called hemagglutinin. In cross-matching, agglutination occurring when donor red blood cells and recipient’s serum or plasma are incubated together indicates that the donor blood is incompatible for that particular recipient.
[17] Maximum photosynthetic activity occurs in -
A.
blue and red region of light
B.
green and yellow region of light
C.
blue and orange region of light
D.
violet and orange region of light
Ans:
blue and red region of light
Explanation :
Wavelength of light between 400 nm and 700 nm is most effective for photosynthesis. This light is called photo synthetically active radiation (PAR). Comparatively more photosynthesis occurs is red and blue regions though others have significant net photosynthesis. Light has maximum efficiency in red and minimum in blue region. In both these regions light is absorbed by chlorophylls.
[18] Radioimmunoassay (RIA) is a therapy used -
A.
to cure lung cancer
B.
to cure AIDS
C.
to cure fractures in bones
D.
to detect antibodies and hormones present in the blood samples
Ans:
to detect antibodies and hormones present in the blood samples
Explanation :
Radioimmunoassay (RIA) is a very sensitive in vitro assay technique used to measure concentrations of antigens (for example, hormone levels in the blood) by use of antibodies. As such, it can be seen as the inverse of a radio binding assay, which quantifies an antibody by use of corresponding antigens. Although the RIA technique is extremely sensitive and extremely specific, requiring specialized equipment, it remains the least expensive method to perform such tests. It requires special precautions and licensing, since radioactive substances are used. Today it has been supplanted by the ELISA method.
[19] Fat soluble vitamins are -
A.
Tocopherol, Niacin, Cyanocobalamin
B.
Calciferol, Carotene, Tocopherol
C.
Ascorbic acid, Calciferol, Riboflavin
D.
Thiamine, Carotene, Biotin
Ans:
Calciferol, Carotene, Tocopherol
Explanation :
Calciferol (Vitamin D): Tocopherols and tocotrienols (Vitamin E); Phylloquinone, menaquinones (Vitamin K); and Retinol, retinal, and four carotenoids including beta carotene (Vitamin Al are all fat soluble vitamins.
[20] What is "ALZHEIMER'S" disease?
A.
It is a disorder of the brain
B.
It affects liver
C.
It affects kidney
D.
It affects human immune system
Ans:
It is a disorder of the brain
Explanation :
Alzheimer's disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities, including memory and reasoning, which become severe enough to impede social or occupational functioning. Alzheimer's disease is also known as simply Senile Dementia.
[21] Grey hair is caused due to -
A.
aging of epidermal cells
B.
death of dermal cells
C.
loss of sebum in epidermal cells
D.
loss of melanin in epidermal cells
Ans:
loss of melanin in epidermal cells
Explanation :
0
[22] Stomatal opening is based on -
A.
Exosrnosis
B.
Endosmosis
C.
Plasmolysis in guard cells
D.
Decrease in concentration of cell sap
Ans:
Endosmosis
Explanation :
According to the K+ ion theory the guard cells absorb K+ ions from the cells around them as they produce ATP (due to photosynthesis) and become hypertonic. This leads to absorption of water from nearby cells by endosmosis due to which the guard cells become turgid and the stomata opens. Decreasing light intensity and photosynthesis causes Stomatal closing.
[23] Optics is the study of:
A.
Nature and properties of light
B.
Old age, its phenomenon, disease etc
C.
Disease of the nervous system
D.
Symbolic representations
Ans:
Nature and properties of light
Explanation :
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter. Optics usually describes the behavior of visible, ultraviolet, and infrared light.
[24] Bakeries use yeast in bread-making because it -
A.
makes the bread hard
B.
makes the bread soft and spongy
C.
enhances the food values
D.
keeps the bread fresh
Ans:
makes the bread soft and spongy
Explanation :
Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
[25] The elements known as primary nutrients for plants
A.
Nitrogen, Phosphorus and Potassium
B.
Nitrogen, Oxygen and Silicon
C.
Potassium, Boron and Nitrogen
D.
Nitrogen, Phosphorus and Iron
Ans:
Nitrogen, Phosphorus and Potassium
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements
Explanation :
Vitamin E is an antioxidant that protects body tissue from damage caused by substances called free radicals. Free radicals can harm cells, tissues, and organs. They are believed to play a role in certain conditions related to aging. The body also needs vitamin E to help keep the immune system strong against viruses and bacteria. Vitamin E is also important in the formation of red blood cells and it helps the body use vitamin K. It also helps widen blood vessels and keep blood from clotting inside them.
[16] What happens to a person who receives the wrong type of blood?
A.
All the arteries constrict
B.
All the arteries dialates
C.
The RBCs agglutinate
D.
The spleen and lymphnodes deteriorate
Ans:
The RBCs agglutinate
Explanation :
Red blood cell agglutination indicates clumping of RBC’s due to cold agglutinins which are most commonly IgM antibodies. These antibodies crosslink red cells, which causes overlapping (arrow) and loss of central pallor. The agglutination leads to reduction in red cell count, elevation in MCH and MCV as measured by automated instruments. Hemagglutination is when the particles involved are red blood cells. The agglutin is called hemagglutinin. In cross-matching, agglutination occurring when donor red blood cells and recipient’s serum or plasma are incubated together indicates that the donor blood is incompatible for that particular recipient.
[17] Maximum photosynthetic activity occurs in -
A.
blue and red region of light
B.
green and yellow region of light
C.
blue and orange region of light
D.
violet and orange region of light
Ans:
blue and red region of light
Explanation :
Wavelength of light between 400 nm and 700 nm is most effective for photosynthesis. This light is called photo synthetically active radiation (PAR). Comparatively more photosynthesis occurs is red and blue regions though others have significant net photosynthesis. Light has maximum efficiency in red and minimum in blue region. In both these regions light is absorbed by chlorophylls.
[18] Radioimmunoassay (RIA) is a therapy used -
A.
to cure lung cancer
B.
to cure AIDS
C.
to cure fractures in bones
D.
to detect antibodies and hormones present in the blood samples
Ans:
to detect antibodies and hormones present in the blood samples
Explanation :
Radioimmunoassay (RIA) is a very sensitive in vitro assay technique used to measure concentrations of antigens (for example, hormone levels in the blood) by use of antibodies. As such, it can be seen as the inverse of a radio binding assay, which quantifies an antibody by use of corresponding antigens. Although the RIA technique is extremely sensitive and extremely specific, requiring specialized equipment, it remains the least expensive method to perform such tests. It requires special precautions and licensing, since radioactive substances are used. Today it has been supplanted by the ELISA method.
[19] Fat soluble vitamins are -
A.
Tocopherol, Niacin, Cyanocobalamin
B.
Calciferol, Carotene, Tocopherol
C.
Ascorbic acid, Calciferol, Riboflavin
D.
Thiamine, Carotene, Biotin
Ans:
Calciferol, Carotene, Tocopherol
Explanation :
Calciferol (Vitamin D): Tocopherols and tocotrienols (Vitamin E); Phylloquinone, menaquinones (Vitamin K); and Retinol, retinal, and four carotenoids including beta carotene (Vitamin Al are all fat soluble vitamins.
[20] What is "ALZHEIMER'S" disease?
A.
It is a disorder of the brain
B.
It affects liver
C.
It affects kidney
D.
It affects human immune system
Ans:
It is a disorder of the brain
Explanation :
Alzheimer's disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities, including memory and reasoning, which become severe enough to impede social or occupational functioning. Alzheimer's disease is also known as simply Senile Dementia.
[21] Grey hair is caused due to -
A.
aging of epidermal cells
B.
death of dermal cells
C.
loss of sebum in epidermal cells
D.
loss of melanin in epidermal cells
Ans:
loss of melanin in epidermal cells
Explanation :
0
[22] Stomatal opening is based on -
A.
Exosrnosis
B.
Endosmosis
C.
Plasmolysis in guard cells
D.
Decrease in concentration of cell sap
Ans:
Endosmosis
Explanation :
According to the K+ ion theory the guard cells absorb K+ ions from the cells around them as they produce ATP (due to photosynthesis) and become hypertonic. This leads to absorption of water from nearby cells by endosmosis due to which the guard cells become turgid and the stomata opens. Decreasing light intensity and photosynthesis causes Stomatal closing.
[23] Optics is the study of:
A.
Nature and properties of light
B.
Old age, its phenomenon, disease etc
C.
Disease of the nervous system
D.
Symbolic representations
Ans:
Nature and properties of light
Explanation :
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter. Optics usually describes the behavior of visible, ultraviolet, and infrared light.
[24] Bakeries use yeast in bread-making because it -
A.
makes the bread hard
B.
makes the bread soft and spongy
C.
enhances the food values
D.
keeps the bread fresh
Ans:
makes the bread soft and spongy
Explanation :
Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
[25] The elements known as primary nutrients for plants
A.
Nitrogen, Phosphorus and Potassium
B.
Nitrogen, Oxygen and Silicon
C.
Potassium, Boron and Nitrogen
D.
Nitrogen, Phosphorus and Iron
Ans:
Nitrogen, Phosphorus and Potassium
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements
Explanation :
Wavelength of light between 400 nm and 700 nm is most effective for photosynthesis. This light is called photo synthetically active radiation (PAR). Comparatively more photosynthesis occurs is red and blue regions though others have significant net photosynthesis. Light has maximum efficiency in red and minimum in blue region. In both these regions light is absorbed by chlorophylls.
[18] Radioimmunoassay (RIA) is a therapy used -
A.
to cure lung cancer
B.
to cure AIDS
C.
to cure fractures in bones
D.
to detect antibodies and hormones present in the blood samples
Ans:
to detect antibodies and hormones present in the blood samples
Explanation :
Radioimmunoassay (RIA) is a very sensitive in vitro assay technique used to measure concentrations of antigens (for example, hormone levels in the blood) by use of antibodies. As such, it can be seen as the inverse of a radio binding assay, which quantifies an antibody by use of corresponding antigens. Although the RIA technique is extremely sensitive and extremely specific, requiring specialized equipment, it remains the least expensive method to perform such tests. It requires special precautions and licensing, since radioactive substances are used. Today it has been supplanted by the ELISA method.
[19] Fat soluble vitamins are -
A.
Tocopherol, Niacin, Cyanocobalamin
B.
Calciferol, Carotene, Tocopherol
C.
Ascorbic acid, Calciferol, Riboflavin
D.
Thiamine, Carotene, Biotin
Ans:
Calciferol, Carotene, Tocopherol
Explanation :
Calciferol (Vitamin D): Tocopherols and tocotrienols (Vitamin E); Phylloquinone, menaquinones (Vitamin K); and Retinol, retinal, and four carotenoids including beta carotene (Vitamin Al are all fat soluble vitamins.
[20] What is "ALZHEIMER'S" disease?
A.
It is a disorder of the brain
B.
It affects liver
C.
It affects kidney
D.
It affects human immune system
Ans:
It is a disorder of the brain
Explanation :
Alzheimer's disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities, including memory and reasoning, which become severe enough to impede social or occupational functioning. Alzheimer's disease is also known as simply Senile Dementia.
[21] Grey hair is caused due to -
A.
aging of epidermal cells
B.
death of dermal cells
C.
loss of sebum in epidermal cells
D.
loss of melanin in epidermal cells
Ans:
loss of melanin in epidermal cells
Explanation :
0
[22] Stomatal opening is based on -
A.
Exosrnosis
B.
Endosmosis
C.
Plasmolysis in guard cells
D.
Decrease in concentration of cell sap
Ans:
Endosmosis
Explanation :
According to the K+ ion theory the guard cells absorb K+ ions from the cells around them as they produce ATP (due to photosynthesis) and become hypertonic. This leads to absorption of water from nearby cells by endosmosis due to which the guard cells become turgid and the stomata opens. Decreasing light intensity and photosynthesis causes Stomatal closing.
[23] Optics is the study of:
A.
Nature and properties of light
B.
Old age, its phenomenon, disease etc
C.
Disease of the nervous system
D.
Symbolic representations
Ans:
Nature and properties of light
Explanation :
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter. Optics usually describes the behavior of visible, ultraviolet, and infrared light.
[24] Bakeries use yeast in bread-making because it -
A.
makes the bread hard
B.
makes the bread soft and spongy
C.
enhances the food values
D.
keeps the bread fresh
Ans:
makes the bread soft and spongy
Explanation :
Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
[25] The elements known as primary nutrients for plants
A.
Nitrogen, Phosphorus and Potassium
B.
Nitrogen, Oxygen and Silicon
C.
Potassium, Boron and Nitrogen
D.
Nitrogen, Phosphorus and Iron
Ans:
Nitrogen, Phosphorus and Potassium
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements
Explanation :
Calciferol (Vitamin D): Tocopherols and tocotrienols (Vitamin E); Phylloquinone, menaquinones (Vitamin K); and Retinol, retinal, and four carotenoids including beta carotene (Vitamin Al are all fat soluble vitamins.
[20] What is "ALZHEIMER'S" disease?
A.
It is a disorder of the brain
B.
It affects liver
C.
It affects kidney
D.
It affects human immune system
Ans:
It is a disorder of the brain
Explanation :
Alzheimer's disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities, including memory and reasoning, which become severe enough to impede social or occupational functioning. Alzheimer's disease is also known as simply Senile Dementia.
[21] Grey hair is caused due to -
A.
aging of epidermal cells
B.
death of dermal cells
C.
loss of sebum in epidermal cells
D.
loss of melanin in epidermal cells
Ans:
loss of melanin in epidermal cells
Explanation :
0
[22] Stomatal opening is based on -
A.
Exosrnosis
B.
Endosmosis
C.
Plasmolysis in guard cells
D.
Decrease in concentration of cell sap
Ans:
Endosmosis
Explanation :
According to the K+ ion theory the guard cells absorb K+ ions from the cells around them as they produce ATP (due to photosynthesis) and become hypertonic. This leads to absorption of water from nearby cells by endosmosis due to which the guard cells become turgid and the stomata opens. Decreasing light intensity and photosynthesis causes Stomatal closing.
[23] Optics is the study of:
A.
Nature and properties of light
B.
Old age, its phenomenon, disease etc
C.
Disease of the nervous system
D.
Symbolic representations
Ans:
Nature and properties of light
Explanation :
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter. Optics usually describes the behavior of visible, ultraviolet, and infrared light.
[24] Bakeries use yeast in bread-making because it -
A.
makes the bread hard
B.
makes the bread soft and spongy
C.
enhances the food values
D.
keeps the bread fresh
Ans:
makes the bread soft and spongy
Explanation :
Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
[25] The elements known as primary nutrients for plants
A.
Nitrogen, Phosphorus and Potassium
B.
Nitrogen, Oxygen and Silicon
C.
Potassium, Boron and Nitrogen
D.
Nitrogen, Phosphorus and Iron
Ans:
Nitrogen, Phosphorus and Potassium
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements
Explanation :
0
[22] Stomatal opening is based on -
A.
Exosrnosis
B.
Endosmosis
C.
Plasmolysis in guard cells
D.
Decrease in concentration of cell sap
Ans:
Endosmosis
Explanation :
According to the K+ ion theory the guard cells absorb K+ ions from the cells around them as they produce ATP (due to photosynthesis) and become hypertonic. This leads to absorption of water from nearby cells by endosmosis due to which the guard cells become turgid and the stomata opens. Decreasing light intensity and photosynthesis causes Stomatal closing.
[23] Optics is the study of:
A.
Nature and properties of light
B.
Old age, its phenomenon, disease etc
C.
Disease of the nervous system
D.
Symbolic representations
Ans:
Nature and properties of light
Explanation :
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter. Optics usually describes the behavior of visible, ultraviolet, and infrared light.
[24] Bakeries use yeast in bread-making because it -
A.
makes the bread hard
B.
makes the bread soft and spongy
C.
enhances the food values
D.
keeps the bread fresh
Ans:
makes the bread soft and spongy
Explanation :
Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
[25] The elements known as primary nutrients for plants
A.
Nitrogen, Phosphorus and Potassium
B.
Nitrogen, Oxygen and Silicon
C.
Potassium, Boron and Nitrogen
D.
Nitrogen, Phosphorus and Iron
Ans:
Nitrogen, Phosphorus and Potassium
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements
Explanation :
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter. Optics usually describes the behavior of visible, ultraviolet, and infrared light.
[24] Bakeries use yeast in bread-making because it -
A.
makes the bread hard
B.
makes the bread soft and spongy
C.
enhances the food values
D.
keeps the bread fresh
Ans:
makes the bread soft and spongy
Explanation :
Bread is usually made from wheat-flour dough that is cultured with yeast, allowed to rise, and finally baked in an oven. The fermentation due to yeast makes the bread soft and spongy.
[25] The elements known as primary nutrients for plants
A.
Nitrogen, Phosphorus and Potassium
B.
Nitrogen, Oxygen and Silicon
C.
Potassium, Boron and Nitrogen
D.
Nitrogen, Phosphorus and Iron
Ans:
Nitrogen, Phosphorus and Potassium
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements
Explanation :
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur. Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, known as trace elements