[1] Genes are not found in pairs -
A.
in body cells
B.
in ovary after fertilization
C.
in gametes
D.
in zygotes
Ans:
in gametes
Explanation :
Genes are a part of the chromosome and are found in pairs in somatic cells. One member of the gene pair segregates into a gamete, thus each gamete only carries one member of the gene pair. Gametes unite at random and irrespective of the other gene pairs involved.
[2] Which vein brings clean blood from the lungs into the heart?
A.
Renal Vein
B.
Pulmonary Vein
C.
Vena Cava
D.
Hepatic Vein
Ans:
Pulmonary Vein
Explanation :
The pulmonary veins are a set of veins that deliver clean oxygenated blood from the lungs to the heart. It brings oxygen-rich blood to the left atrium. Systemic veins deliver deoxygenated blood to the heart.
[3] Leaving agricultural land uncultivated for some years known as -
A.
Intensive farming
B.
Fallowing
C.
Shifting cultivation
D.
Subsistence farming
Ans:
Fallowing
Explanation :
A land that has undergone plowing and harrowing and has been left unseeded for one or more growing seasons is known as fallow and the process as fallowing.
[4] The gametophyte is called prothallus in -
A.
Pteridophyta
B.
Bryophyta
C.
Sperrnatophyta
D.
Thallophyta
Ans:
Pteridophyta
Explanation :
Prothallus is usually the gametophyte stage in the life of a fern or other pteridophytes. The prothallus develops from a germinating spore. It is a short-lived and inconspicuous heart-shaped structure.
[5] The best example of Polyembryony is -
A.
Cocoa
B.
Capsicum
C.
Citrus
D.
Cycas
Ans:
Citrus
Explanation :
In citrus fruits such as oranges, the nuclear cells that surround the embryo start dividing and protrude into the embryo sac. These develop into embryos; thus resulting in the presence of more than one embryo inside each ovule. This condition is known as polyembryony.
[6] The main function of palisade parenchyma in leaf is -
A.
Antibiotics
B.
Pollutants
C.
Hormones
D.
Toxins
Ans:
Toxins
Explanation :
Palisade parenchyma is the layer of tissue directly beneath the epidermis of the upper surface of a leaf. It contains the cylinder-shaped cells that hold the chloroplasts and constitutes the primary area of photosynthesis that converts the light energy to the chemical energy of carbohydrates
[7] The harmful substances produced by the microbes are known as -
A.
Antibiotics
B.
Pollutants
C.
Hormones
D.
Toxins
Ans:
Toxins
Explanation :
Toxins are substances created by plants and animals that are poisonous to humans. Most toxins that cause problems in humans are released by microorganisms such as bacteria, viruses, fungi, rickettsiae or protozoa. For example, cholera is due to a bacterial toxin.
[8] Which of the following fuels causes minimum environmental pollution?
A.
Kerosene
B.
Diesel
C.
Coal
D.
Hydrogen
Ans:
Hydrogen
Explanation :
Most of environmental (air) pollution results from the burning of fossil fuels, such as coal, oil, natural gas, and gasoline to produce electricity and power. All these produce harmful CO2 or its variants. On the contrary, when hydrogen burns in air, it produces nothing but water vapor. It is therefore the cleanest possible as it doesn't produce CO2.
[9] Which one of the following is the infective stage of the Malarial Parasite?
A.
schigozoite
B.
trophozoite
C.
sporoblast
D.
sporozoite
Ans:
sporozoite
Explanation :
When a mosquito sucks the blood of a person who has malaria parasites in his or her blood, the mosquito picks male and female gametocytes where they undergo a series of changes to become sporozoites. The sporozoites are the infective stages of malaria parasites in the mosquito. This process takes about 10 -14 days depending on environmental temperature.
[10] Approximate number of skeletal muscles is :
A.
500
B.
700
C.
200
D.
206
Ans:
700
Explanation :
There are approximately 640 skeletal muscles within the typical human, and almost every muscle constitutes one part of a pair of identical bilateral muscles, found on both sides, resulting in approximately 320 pairs of muscles. Nevertheless, the exact number is difficult to define because different sources group muscles differently, e.g. regarding what is defined as different parts of a single muscle or as several muscles. Examples range from 640 to 850.
[11] The Ozone layer protects us from:
A.
Cosmic rays
B.
Ultra-Violet rays
C.
Visible rays
D.
Infrared rays
Ans:
Ultra-Violet rays
Explanation :
The ozone layer refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UN) radiation. It absorbs 97-99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.
[12] Children especially in western countries who receive very little sunshine suffer from -
A.
rickets
B.
dermatitis
C.
scurvy
D.
kwashiorkor
Ans:
rickets
Explanation :
Children who receive very little sunshine (source of vitamin D) suffer from rickets, a skeletal disorder that results from a lack of vitamin D. Rickets is most common in children who are between 6 and 36 months old. Rickets has mostly disappeared in developed countries due to the introduction of fortified foods, such as cereals with added vitamin D.
[13] In water treatment plant, use of chloramines ensures -
A.
taste and odour control
B.
weed control in reservoirs
C.
disinfection
D.
removal of permanent hardness
Ans:
disinfection
Explanation :
The particular type of chloramine used in drinking water disinfection is called monochloramine. Chloramine is chiefly a secondary disinfectant that are added to water that has already been disinfected with a primary disinfectant, often chlorine
[14] Which blood vessels have the smallest diameter?
A.
Capillaries
B.
Arterioles
C.
Venules
D.
Lymphatic
Ans:
Capillaries
Explanation :
Blood is carried through the body by Blood Vessels. With the help of perfusion process capillaries supplies blood to the tissues.
[15] Fermentation of milk to curd is due to -
A.
Mycobacterium
B.
Staphylococcus
C.
Lactobacillus
D.
Yeast
Ans:
Lactobacillus
Explanation :
Milk contains a sugar called lactose, a disaccharide (compound sugar) made by the glycosidic bonding between glucose and glactose (monosaccharides). When milk is heated to a temperature of 30-40 degrees centigrade and a small amount of old curd added to it, the lactobacillus in that curd sample gets activated and multiplies. These convert the lactose into lactic acid, which imparts the sour taste to curd.
[16] DOTS is a treatment given to patients suffering from -
A.
Polio
B.
AIDS
C.
Hepatitis
D.
Tuberculosis
Ans:
Tuberculosis
Explanation :
DOTS (Directly Observed Treatment, Short Course), also known as TB-DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. It is the best curative method for treatment of tuberculosis because of its highly efficient and cost-effective strategy.
[17] Magnesium is a constituent metal of -
A.
Chlorophyll molecule
B.
DNA
C.
Mitochondria
D.
Ribosomes
Ans:
Chlorophyll molecule
Explanation :
The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium. This was discovered in 1906 and was the first time that magnesium had been detected in living tissue.
[18] Global warming is expected to result in -
A.
Increase in sea level
B.
Change in crop pattern
C.
Change in coastal line
D.
All of these
Ans:
All of these
Explanation :
Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. It will lead to increase in sea level due to melting of polar ice, desertification leading to changes in crop patters, change in coastal line due to their submergence.
[19] Silk wonns feed on -
A.
Basil leaves
B.
Curry leaves
C.
Rose leaves
D.
Mulberry leaves
Ans:
Mulberry leaves
Explanation :
Silkworms are the larva of a moth (Bombyx mori) native to Asia that spins a cocoon of fine, strong, lustrous fiber that is the source of commercial silk. silkworms feed on the leaves of the mulberries (genus Moms) and sometimes on the Osage orange (Madura pomifera).
[20] Which of the following foods gives instant energy to the athletes?
A.
Cheese
B.
Glucose
C.
Ghee
D.
Vitamins
Ans:
Glucose
Explanation :
During exercise or sports activity, our body relies on glycogen to keep the blood sugar levels stable and thus maintain energy. Glucose gives the body the instant energy it needs to perform at its best.
[21] Trachoma is a disease of the -
A.
Liver
B.
Eyes
C.
Lungs
D.
Kidneys
Ans:
Eyes
Explanation :
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness.
[22] The chemical component that is invariably found in all viruses is -
A.
proteins
B.
lipids
C.
DNA
D.
RNA
Ans:
proteins
Explanation :
All viruses contain the following two components: a nucleic acid genome and a protein capsid that covers the genome. Together this is called the nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope. The entire intact virus is called the virion.
[23] Which is used as an Air pollution indicator?
A.
Algae
B.
Fungi
C.
Bacteria
D.
Lichens
Ans:
Lichens
Explanation :
Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.
[24] Which one of the following is a carbohydrate?
A.
Urea
B.
Insulin
C.
Glycine
D.
Glucose
Ans:
Glucose
Explanation :
Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
[25] The source of oxygen in atmosphere is due to -
A.
Photosynthesis
B.
Excretion
C.
Nitrogen fixation
D.
Respiration
Ans:
Photosynthesis
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2
Explanation :
Genes are a part of the chromosome and are found in pairs in somatic cells. One member of the gene pair segregates into a gamete, thus each gamete only carries one member of the gene pair. Gametes unite at random and irrespective of the other gene pairs involved.
[2] Which vein brings clean blood from the lungs into the heart?
A.
Renal Vein
B.
Pulmonary Vein
C.
Vena Cava
D.
Hepatic Vein
Ans:
Pulmonary Vein
Explanation :
The pulmonary veins are a set of veins that deliver clean oxygenated blood from the lungs to the heart. It brings oxygen-rich blood to the left atrium. Systemic veins deliver deoxygenated blood to the heart.
[3] Leaving agricultural land uncultivated for some years known as -
A.
Intensive farming
B.
Fallowing
C.
Shifting cultivation
D.
Subsistence farming
Ans:
Fallowing
Explanation :
A land that has undergone plowing and harrowing and has been left unseeded for one or more growing seasons is known as fallow and the process as fallowing.
[4] The gametophyte is called prothallus in -
A.
Pteridophyta
B.
Bryophyta
C.
Sperrnatophyta
D.
Thallophyta
Ans:
Pteridophyta
Explanation :
Prothallus is usually the gametophyte stage in the life of a fern or other pteridophytes. The prothallus develops from a germinating spore. It is a short-lived and inconspicuous heart-shaped structure.
[5] The best example of Polyembryony is -
A.
Cocoa
B.
Capsicum
C.
Citrus
D.
Cycas
Ans:
Citrus
Explanation :
In citrus fruits such as oranges, the nuclear cells that surround the embryo start dividing and protrude into the embryo sac. These develop into embryos; thus resulting in the presence of more than one embryo inside each ovule. This condition is known as polyembryony.
[6] The main function of palisade parenchyma in leaf is -
A.
Antibiotics
B.
Pollutants
C.
Hormones
D.
Toxins
Ans:
Toxins
Explanation :
Palisade parenchyma is the layer of tissue directly beneath the epidermis of the upper surface of a leaf. It contains the cylinder-shaped cells that hold the chloroplasts and constitutes the primary area of photosynthesis that converts the light energy to the chemical energy of carbohydrates
[7] The harmful substances produced by the microbes are known as -
A.
Antibiotics
B.
Pollutants
C.
Hormones
D.
Toxins
Ans:
Toxins
Explanation :
Toxins are substances created by plants and animals that are poisonous to humans. Most toxins that cause problems in humans are released by microorganisms such as bacteria, viruses, fungi, rickettsiae or protozoa. For example, cholera is due to a bacterial toxin.
[8] Which of the following fuels causes minimum environmental pollution?
A.
Kerosene
B.
Diesel
C.
Coal
D.
Hydrogen
Ans:
Hydrogen
Explanation :
Most of environmental (air) pollution results from the burning of fossil fuels, such as coal, oil, natural gas, and gasoline to produce electricity and power. All these produce harmful CO2 or its variants. On the contrary, when hydrogen burns in air, it produces nothing but water vapor. It is therefore the cleanest possible as it doesn't produce CO2.
[9] Which one of the following is the infective stage of the Malarial Parasite?
A.
schigozoite
B.
trophozoite
C.
sporoblast
D.
sporozoite
Ans:
sporozoite
Explanation :
When a mosquito sucks the blood of a person who has malaria parasites in his or her blood, the mosquito picks male and female gametocytes where they undergo a series of changes to become sporozoites. The sporozoites are the infective stages of malaria parasites in the mosquito. This process takes about 10 -14 days depending on environmental temperature.
[10] Approximate number of skeletal muscles is :
A.
500
B.
700
C.
200
D.
206
Ans:
700
Explanation :
There are approximately 640 skeletal muscles within the typical human, and almost every muscle constitutes one part of a pair of identical bilateral muscles, found on both sides, resulting in approximately 320 pairs of muscles. Nevertheless, the exact number is difficult to define because different sources group muscles differently, e.g. regarding what is defined as different parts of a single muscle or as several muscles. Examples range from 640 to 850.
[11] The Ozone layer protects us from:
A.
Cosmic rays
B.
Ultra-Violet rays
C.
Visible rays
D.
Infrared rays
Ans:
Ultra-Violet rays
Explanation :
The ozone layer refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UN) radiation. It absorbs 97-99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.
[12] Children especially in western countries who receive very little sunshine suffer from -
A.
rickets
B.
dermatitis
C.
scurvy
D.
kwashiorkor
Ans:
rickets
Explanation :
Children who receive very little sunshine (source of vitamin D) suffer from rickets, a skeletal disorder that results from a lack of vitamin D. Rickets is most common in children who are between 6 and 36 months old. Rickets has mostly disappeared in developed countries due to the introduction of fortified foods, such as cereals with added vitamin D.
[13] In water treatment plant, use of chloramines ensures -
A.
taste and odour control
B.
weed control in reservoirs
C.
disinfection
D.
removal of permanent hardness
Ans:
disinfection
Explanation :
The particular type of chloramine used in drinking water disinfection is called monochloramine. Chloramine is chiefly a secondary disinfectant that are added to water that has already been disinfected with a primary disinfectant, often chlorine
[14] Which blood vessels have the smallest diameter?
A.
Capillaries
B.
Arterioles
C.
Venules
D.
Lymphatic
Ans:
Capillaries
Explanation :
Blood is carried through the body by Blood Vessels. With the help of perfusion process capillaries supplies blood to the tissues.
[15] Fermentation of milk to curd is due to -
A.
Mycobacterium
B.
Staphylococcus
C.
Lactobacillus
D.
Yeast
Ans:
Lactobacillus
Explanation :
Milk contains a sugar called lactose, a disaccharide (compound sugar) made by the glycosidic bonding between glucose and glactose (monosaccharides). When milk is heated to a temperature of 30-40 degrees centigrade and a small amount of old curd added to it, the lactobacillus in that curd sample gets activated and multiplies. These convert the lactose into lactic acid, which imparts the sour taste to curd.
[16] DOTS is a treatment given to patients suffering from -
A.
Polio
B.
AIDS
C.
Hepatitis
D.
Tuberculosis
Ans:
Tuberculosis
Explanation :
DOTS (Directly Observed Treatment, Short Course), also known as TB-DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. It is the best curative method for treatment of tuberculosis because of its highly efficient and cost-effective strategy.
[17] Magnesium is a constituent metal of -
A.
Chlorophyll molecule
B.
DNA
C.
Mitochondria
D.
Ribosomes
Ans:
Chlorophyll molecule
Explanation :
The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium. This was discovered in 1906 and was the first time that magnesium had been detected in living tissue.
[18] Global warming is expected to result in -
A.
Increase in sea level
B.
Change in crop pattern
C.
Change in coastal line
D.
All of these
Ans:
All of these
Explanation :
Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. It will lead to increase in sea level due to melting of polar ice, desertification leading to changes in crop patters, change in coastal line due to their submergence.
[19] Silk wonns feed on -
A.
Basil leaves
B.
Curry leaves
C.
Rose leaves
D.
Mulberry leaves
Ans:
Mulberry leaves
Explanation :
Silkworms are the larva of a moth (Bombyx mori) native to Asia that spins a cocoon of fine, strong, lustrous fiber that is the source of commercial silk. silkworms feed on the leaves of the mulberries (genus Moms) and sometimes on the Osage orange (Madura pomifera).
[20] Which of the following foods gives instant energy to the athletes?
A.
Cheese
B.
Glucose
C.
Ghee
D.
Vitamins
Ans:
Glucose
Explanation :
During exercise or sports activity, our body relies on glycogen to keep the blood sugar levels stable and thus maintain energy. Glucose gives the body the instant energy it needs to perform at its best.
[21] Trachoma is a disease of the -
A.
Liver
B.
Eyes
C.
Lungs
D.
Kidneys
Ans:
Eyes
Explanation :
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness.
[22] The chemical component that is invariably found in all viruses is -
A.
proteins
B.
lipids
C.
DNA
D.
RNA
Ans:
proteins
Explanation :
All viruses contain the following two components: a nucleic acid genome and a protein capsid that covers the genome. Together this is called the nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope. The entire intact virus is called the virion.
[23] Which is used as an Air pollution indicator?
A.
Algae
B.
Fungi
C.
Bacteria
D.
Lichens
Ans:
Lichens
Explanation :
Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.
[24] Which one of the following is a carbohydrate?
A.
Urea
B.
Insulin
C.
Glycine
D.
Glucose
Ans:
Glucose
Explanation :
Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
[25] The source of oxygen in atmosphere is due to -
A.
Photosynthesis
B.
Excretion
C.
Nitrogen fixation
D.
Respiration
Ans:
Photosynthesis
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2
Explanation :
A land that has undergone plowing and harrowing and has been left unseeded for one or more growing seasons is known as fallow and the process as fallowing.
[4] The gametophyte is called prothallus in -
A.
Pteridophyta
B.
Bryophyta
C.
Sperrnatophyta
D.
Thallophyta
Ans:
Pteridophyta
Explanation :
Prothallus is usually the gametophyte stage in the life of a fern or other pteridophytes. The prothallus develops from a germinating spore. It is a short-lived and inconspicuous heart-shaped structure.
[5] The best example of Polyembryony is -
A.
Cocoa
B.
Capsicum
C.
Citrus
D.
Cycas
Ans:
Citrus
Explanation :
In citrus fruits such as oranges, the nuclear cells that surround the embryo start dividing and protrude into the embryo sac. These develop into embryos; thus resulting in the presence of more than one embryo inside each ovule. This condition is known as polyembryony.
[6] The main function of palisade parenchyma in leaf is -
A.
Antibiotics
B.
Pollutants
C.
Hormones
D.
Toxins
Ans:
Toxins
Explanation :
Palisade parenchyma is the layer of tissue directly beneath the epidermis of the upper surface of a leaf. It contains the cylinder-shaped cells that hold the chloroplasts and constitutes the primary area of photosynthesis that converts the light energy to the chemical energy of carbohydrates
[7] The harmful substances produced by the microbes are known as -
A.
Antibiotics
B.
Pollutants
C.
Hormones
D.
Toxins
Ans:
Toxins
Explanation :
Toxins are substances created by plants and animals that are poisonous to humans. Most toxins that cause problems in humans are released by microorganisms such as bacteria, viruses, fungi, rickettsiae or protozoa. For example, cholera is due to a bacterial toxin.
[8] Which of the following fuels causes minimum environmental pollution?
A.
Kerosene
B.
Diesel
C.
Coal
D.
Hydrogen
Ans:
Hydrogen
Explanation :
Most of environmental (air) pollution results from the burning of fossil fuels, such as coal, oil, natural gas, and gasoline to produce electricity and power. All these produce harmful CO2 or its variants. On the contrary, when hydrogen burns in air, it produces nothing but water vapor. It is therefore the cleanest possible as it doesn't produce CO2.
[9] Which one of the following is the infective stage of the Malarial Parasite?
A.
schigozoite
B.
trophozoite
C.
sporoblast
D.
sporozoite
Ans:
sporozoite
Explanation :
When a mosquito sucks the blood of a person who has malaria parasites in his or her blood, the mosquito picks male and female gametocytes where they undergo a series of changes to become sporozoites. The sporozoites are the infective stages of malaria parasites in the mosquito. This process takes about 10 -14 days depending on environmental temperature.
[10] Approximate number of skeletal muscles is :
A.
500
B.
700
C.
200
D.
206
Ans:
700
Explanation :
There are approximately 640 skeletal muscles within the typical human, and almost every muscle constitutes one part of a pair of identical bilateral muscles, found on both sides, resulting in approximately 320 pairs of muscles. Nevertheless, the exact number is difficult to define because different sources group muscles differently, e.g. regarding what is defined as different parts of a single muscle or as several muscles. Examples range from 640 to 850.
[11] The Ozone layer protects us from:
A.
Cosmic rays
B.
Ultra-Violet rays
C.
Visible rays
D.
Infrared rays
Ans:
Ultra-Violet rays
Explanation :
The ozone layer refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UN) radiation. It absorbs 97-99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.
[12] Children especially in western countries who receive very little sunshine suffer from -
A.
rickets
B.
dermatitis
C.
scurvy
D.
kwashiorkor
Ans:
rickets
Explanation :
Children who receive very little sunshine (source of vitamin D) suffer from rickets, a skeletal disorder that results from a lack of vitamin D. Rickets is most common in children who are between 6 and 36 months old. Rickets has mostly disappeared in developed countries due to the introduction of fortified foods, such as cereals with added vitamin D.
[13] In water treatment plant, use of chloramines ensures -
A.
taste and odour control
B.
weed control in reservoirs
C.
disinfection
D.
removal of permanent hardness
Ans:
disinfection
Explanation :
The particular type of chloramine used in drinking water disinfection is called monochloramine. Chloramine is chiefly a secondary disinfectant that are added to water that has already been disinfected with a primary disinfectant, often chlorine
[14] Which blood vessels have the smallest diameter?
A.
Capillaries
B.
Arterioles
C.
Venules
D.
Lymphatic
Ans:
Capillaries
Explanation :
Blood is carried through the body by Blood Vessels. With the help of perfusion process capillaries supplies blood to the tissues.
[15] Fermentation of milk to curd is due to -
A.
Mycobacterium
B.
Staphylococcus
C.
Lactobacillus
D.
Yeast
Ans:
Lactobacillus
Explanation :
Milk contains a sugar called lactose, a disaccharide (compound sugar) made by the glycosidic bonding between glucose and glactose (monosaccharides). When milk is heated to a temperature of 30-40 degrees centigrade and a small amount of old curd added to it, the lactobacillus in that curd sample gets activated and multiplies. These convert the lactose into lactic acid, which imparts the sour taste to curd.
[16] DOTS is a treatment given to patients suffering from -
A.
Polio
B.
AIDS
C.
Hepatitis
D.
Tuberculosis
Ans:
Tuberculosis
Explanation :
DOTS (Directly Observed Treatment, Short Course), also known as TB-DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. It is the best curative method for treatment of tuberculosis because of its highly efficient and cost-effective strategy.
[17] Magnesium is a constituent metal of -
A.
Chlorophyll molecule
B.
DNA
C.
Mitochondria
D.
Ribosomes
Ans:
Chlorophyll molecule
Explanation :
The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium. This was discovered in 1906 and was the first time that magnesium had been detected in living tissue.
[18] Global warming is expected to result in -
A.
Increase in sea level
B.
Change in crop pattern
C.
Change in coastal line
D.
All of these
Ans:
All of these
Explanation :
Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. It will lead to increase in sea level due to melting of polar ice, desertification leading to changes in crop patters, change in coastal line due to their submergence.
[19] Silk wonns feed on -
A.
Basil leaves
B.
Curry leaves
C.
Rose leaves
D.
Mulberry leaves
Ans:
Mulberry leaves
Explanation :
Silkworms are the larva of a moth (Bombyx mori) native to Asia that spins a cocoon of fine, strong, lustrous fiber that is the source of commercial silk. silkworms feed on the leaves of the mulberries (genus Moms) and sometimes on the Osage orange (Madura pomifera).
[20] Which of the following foods gives instant energy to the athletes?
A.
Cheese
B.
Glucose
C.
Ghee
D.
Vitamins
Ans:
Glucose
Explanation :
During exercise or sports activity, our body relies on glycogen to keep the blood sugar levels stable and thus maintain energy. Glucose gives the body the instant energy it needs to perform at its best.
[21] Trachoma is a disease of the -
A.
Liver
B.
Eyes
C.
Lungs
D.
Kidneys
Ans:
Eyes
Explanation :
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness.
[22] The chemical component that is invariably found in all viruses is -
A.
proteins
B.
lipids
C.
DNA
D.
RNA
Ans:
proteins
Explanation :
All viruses contain the following two components: a nucleic acid genome and a protein capsid that covers the genome. Together this is called the nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope. The entire intact virus is called the virion.
[23] Which is used as an Air pollution indicator?
A.
Algae
B.
Fungi
C.
Bacteria
D.
Lichens
Ans:
Lichens
Explanation :
Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.
[24] Which one of the following is a carbohydrate?
A.
Urea
B.
Insulin
C.
Glycine
D.
Glucose
Ans:
Glucose
Explanation :
Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
[25] The source of oxygen in atmosphere is due to -
A.
Photosynthesis
B.
Excretion
C.
Nitrogen fixation
D.
Respiration
Ans:
Photosynthesis
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2
Explanation :
In citrus fruits such as oranges, the nuclear cells that surround the embryo start dividing and protrude into the embryo sac. These develop into embryos; thus resulting in the presence of more than one embryo inside each ovule. This condition is known as polyembryony.
[6] The main function of palisade parenchyma in leaf is -
A.
Antibiotics
B.
Pollutants
C.
Hormones
D.
Toxins
Ans:
Toxins
Explanation :
Palisade parenchyma is the layer of tissue directly beneath the epidermis of the upper surface of a leaf. It contains the cylinder-shaped cells that hold the chloroplasts and constitutes the primary area of photosynthesis that converts the light energy to the chemical energy of carbohydrates
[7] The harmful substances produced by the microbes are known as -
A.
Antibiotics
B.
Pollutants
C.
Hormones
D.
Toxins
Ans:
Toxins
Explanation :
Toxins are substances created by plants and animals that are poisonous to humans. Most toxins that cause problems in humans are released by microorganisms such as bacteria, viruses, fungi, rickettsiae or protozoa. For example, cholera is due to a bacterial toxin.
[8] Which of the following fuels causes minimum environmental pollution?
A.
Kerosene
B.
Diesel
C.
Coal
D.
Hydrogen
Ans:
Hydrogen
Explanation :
Most of environmental (air) pollution results from the burning of fossil fuels, such as coal, oil, natural gas, and gasoline to produce electricity and power. All these produce harmful CO2 or its variants. On the contrary, when hydrogen burns in air, it produces nothing but water vapor. It is therefore the cleanest possible as it doesn't produce CO2.
[9] Which one of the following is the infective stage of the Malarial Parasite?
A.
schigozoite
B.
trophozoite
C.
sporoblast
D.
sporozoite
Ans:
sporozoite
Explanation :
When a mosquito sucks the blood of a person who has malaria parasites in his or her blood, the mosquito picks male and female gametocytes where they undergo a series of changes to become sporozoites. The sporozoites are the infective stages of malaria parasites in the mosquito. This process takes about 10 -14 days depending on environmental temperature.
[10] Approximate number of skeletal muscles is :
A.
500
B.
700
C.
200
D.
206
Ans:
700
Explanation :
There are approximately 640 skeletal muscles within the typical human, and almost every muscle constitutes one part of a pair of identical bilateral muscles, found on both sides, resulting in approximately 320 pairs of muscles. Nevertheless, the exact number is difficult to define because different sources group muscles differently, e.g. regarding what is defined as different parts of a single muscle or as several muscles. Examples range from 640 to 850.
[11] The Ozone layer protects us from:
A.
Cosmic rays
B.
Ultra-Violet rays
C.
Visible rays
D.
Infrared rays
Ans:
Ultra-Violet rays
Explanation :
The ozone layer refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UN) radiation. It absorbs 97-99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.
[12] Children especially in western countries who receive very little sunshine suffer from -
A.
rickets
B.
dermatitis
C.
scurvy
D.
kwashiorkor
Ans:
rickets
Explanation :
Children who receive very little sunshine (source of vitamin D) suffer from rickets, a skeletal disorder that results from a lack of vitamin D. Rickets is most common in children who are between 6 and 36 months old. Rickets has mostly disappeared in developed countries due to the introduction of fortified foods, such as cereals with added vitamin D.
[13] In water treatment plant, use of chloramines ensures -
A.
taste and odour control
B.
weed control in reservoirs
C.
disinfection
D.
removal of permanent hardness
Ans:
disinfection
Explanation :
The particular type of chloramine used in drinking water disinfection is called monochloramine. Chloramine is chiefly a secondary disinfectant that are added to water that has already been disinfected with a primary disinfectant, often chlorine
[14] Which blood vessels have the smallest diameter?
A.
Capillaries
B.
Arterioles
C.
Venules
D.
Lymphatic
Ans:
Capillaries
Explanation :
Blood is carried through the body by Blood Vessels. With the help of perfusion process capillaries supplies blood to the tissues.
[15] Fermentation of milk to curd is due to -
A.
Mycobacterium
B.
Staphylococcus
C.
Lactobacillus
D.
Yeast
Ans:
Lactobacillus
Explanation :
Milk contains a sugar called lactose, a disaccharide (compound sugar) made by the glycosidic bonding between glucose and glactose (monosaccharides). When milk is heated to a temperature of 30-40 degrees centigrade and a small amount of old curd added to it, the lactobacillus in that curd sample gets activated and multiplies. These convert the lactose into lactic acid, which imparts the sour taste to curd.
[16] DOTS is a treatment given to patients suffering from -
A.
Polio
B.
AIDS
C.
Hepatitis
D.
Tuberculosis
Ans:
Tuberculosis
Explanation :
DOTS (Directly Observed Treatment, Short Course), also known as TB-DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. It is the best curative method for treatment of tuberculosis because of its highly efficient and cost-effective strategy.
[17] Magnesium is a constituent metal of -
A.
Chlorophyll molecule
B.
DNA
C.
Mitochondria
D.
Ribosomes
Ans:
Chlorophyll molecule
Explanation :
The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium. This was discovered in 1906 and was the first time that magnesium had been detected in living tissue.
[18] Global warming is expected to result in -
A.
Increase in sea level
B.
Change in crop pattern
C.
Change in coastal line
D.
All of these
Ans:
All of these
Explanation :
Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. It will lead to increase in sea level due to melting of polar ice, desertification leading to changes in crop patters, change in coastal line due to their submergence.
[19] Silk wonns feed on -
A.
Basil leaves
B.
Curry leaves
C.
Rose leaves
D.
Mulberry leaves
Ans:
Mulberry leaves
Explanation :
Silkworms are the larva of a moth (Bombyx mori) native to Asia that spins a cocoon of fine, strong, lustrous fiber that is the source of commercial silk. silkworms feed on the leaves of the mulberries (genus Moms) and sometimes on the Osage orange (Madura pomifera).
[20] Which of the following foods gives instant energy to the athletes?
A.
Cheese
B.
Glucose
C.
Ghee
D.
Vitamins
Ans:
Glucose
Explanation :
During exercise or sports activity, our body relies on glycogen to keep the blood sugar levels stable and thus maintain energy. Glucose gives the body the instant energy it needs to perform at its best.
[21] Trachoma is a disease of the -
A.
Liver
B.
Eyes
C.
Lungs
D.
Kidneys
Ans:
Eyes
Explanation :
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness.
[22] The chemical component that is invariably found in all viruses is -
A.
proteins
B.
lipids
C.
DNA
D.
RNA
Ans:
proteins
Explanation :
All viruses contain the following two components: a nucleic acid genome and a protein capsid that covers the genome. Together this is called the nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope. The entire intact virus is called the virion.
[23] Which is used as an Air pollution indicator?
A.
Algae
B.
Fungi
C.
Bacteria
D.
Lichens
Ans:
Lichens
Explanation :
Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.
[24] Which one of the following is a carbohydrate?
A.
Urea
B.
Insulin
C.
Glycine
D.
Glucose
Ans:
Glucose
Explanation :
Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
[25] The source of oxygen in atmosphere is due to -
A.
Photosynthesis
B.
Excretion
C.
Nitrogen fixation
D.
Respiration
Ans:
Photosynthesis
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2
Explanation :
Toxins are substances created by plants and animals that are poisonous to humans. Most toxins that cause problems in humans are released by microorganisms such as bacteria, viruses, fungi, rickettsiae or protozoa. For example, cholera is due to a bacterial toxin.
[8] Which of the following fuels causes minimum environmental pollution?
A.
Kerosene
B.
Diesel
C.
Coal
D.
Hydrogen
Ans:
Hydrogen
Explanation :
Most of environmental (air) pollution results from the burning of fossil fuels, such as coal, oil, natural gas, and gasoline to produce electricity and power. All these produce harmful CO2 or its variants. On the contrary, when hydrogen burns in air, it produces nothing but water vapor. It is therefore the cleanest possible as it doesn't produce CO2.
[9] Which one of the following is the infective stage of the Malarial Parasite?
A.
schigozoite
B.
trophozoite
C.
sporoblast
D.
sporozoite
Ans:
sporozoite
Explanation :
When a mosquito sucks the blood of a person who has malaria parasites in his or her blood, the mosquito picks male and female gametocytes where they undergo a series of changes to become sporozoites. The sporozoites are the infective stages of malaria parasites in the mosquito. This process takes about 10 -14 days depending on environmental temperature.
[10] Approximate number of skeletal muscles is :
A.
500
B.
700
C.
200
D.
206
Ans:
700
Explanation :
There are approximately 640 skeletal muscles within the typical human, and almost every muscle constitutes one part of a pair of identical bilateral muscles, found on both sides, resulting in approximately 320 pairs of muscles. Nevertheless, the exact number is difficult to define because different sources group muscles differently, e.g. regarding what is defined as different parts of a single muscle or as several muscles. Examples range from 640 to 850.
[11] The Ozone layer protects us from:
A.
Cosmic rays
B.
Ultra-Violet rays
C.
Visible rays
D.
Infrared rays
Ans:
Ultra-Violet rays
Explanation :
The ozone layer refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UN) radiation. It absorbs 97-99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.
[12] Children especially in western countries who receive very little sunshine suffer from -
A.
rickets
B.
dermatitis
C.
scurvy
D.
kwashiorkor
Ans:
rickets
Explanation :
Children who receive very little sunshine (source of vitamin D) suffer from rickets, a skeletal disorder that results from a lack of vitamin D. Rickets is most common in children who are between 6 and 36 months old. Rickets has mostly disappeared in developed countries due to the introduction of fortified foods, such as cereals with added vitamin D.
[13] In water treatment plant, use of chloramines ensures -
A.
taste and odour control
B.
weed control in reservoirs
C.
disinfection
D.
removal of permanent hardness
Ans:
disinfection
Explanation :
The particular type of chloramine used in drinking water disinfection is called monochloramine. Chloramine is chiefly a secondary disinfectant that are added to water that has already been disinfected with a primary disinfectant, often chlorine
[14] Which blood vessels have the smallest diameter?
A.
Capillaries
B.
Arterioles
C.
Venules
D.
Lymphatic
Ans:
Capillaries
Explanation :
Blood is carried through the body by Blood Vessels. With the help of perfusion process capillaries supplies blood to the tissues.
[15] Fermentation of milk to curd is due to -
A.
Mycobacterium
B.
Staphylococcus
C.
Lactobacillus
D.
Yeast
Ans:
Lactobacillus
Explanation :
Milk contains a sugar called lactose, a disaccharide (compound sugar) made by the glycosidic bonding between glucose and glactose (monosaccharides). When milk is heated to a temperature of 30-40 degrees centigrade and a small amount of old curd added to it, the lactobacillus in that curd sample gets activated and multiplies. These convert the lactose into lactic acid, which imparts the sour taste to curd.
[16] DOTS is a treatment given to patients suffering from -
A.
Polio
B.
AIDS
C.
Hepatitis
D.
Tuberculosis
Ans:
Tuberculosis
Explanation :
DOTS (Directly Observed Treatment, Short Course), also known as TB-DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. It is the best curative method for treatment of tuberculosis because of its highly efficient and cost-effective strategy.
[17] Magnesium is a constituent metal of -
A.
Chlorophyll molecule
B.
DNA
C.
Mitochondria
D.
Ribosomes
Ans:
Chlorophyll molecule
Explanation :
The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium. This was discovered in 1906 and was the first time that magnesium had been detected in living tissue.
[18] Global warming is expected to result in -
A.
Increase in sea level
B.
Change in crop pattern
C.
Change in coastal line
D.
All of these
Ans:
All of these
Explanation :
Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. It will lead to increase in sea level due to melting of polar ice, desertification leading to changes in crop patters, change in coastal line due to their submergence.
[19] Silk wonns feed on -
A.
Basil leaves
B.
Curry leaves
C.
Rose leaves
D.
Mulberry leaves
Ans:
Mulberry leaves
Explanation :
Silkworms are the larva of a moth (Bombyx mori) native to Asia that spins a cocoon of fine, strong, lustrous fiber that is the source of commercial silk. silkworms feed on the leaves of the mulberries (genus Moms) and sometimes on the Osage orange (Madura pomifera).
[20] Which of the following foods gives instant energy to the athletes?
A.
Cheese
B.
Glucose
C.
Ghee
D.
Vitamins
Ans:
Glucose
Explanation :
During exercise or sports activity, our body relies on glycogen to keep the blood sugar levels stable and thus maintain energy. Glucose gives the body the instant energy it needs to perform at its best.
[21] Trachoma is a disease of the -
A.
Liver
B.
Eyes
C.
Lungs
D.
Kidneys
Ans:
Eyes
Explanation :
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness.
[22] The chemical component that is invariably found in all viruses is -
A.
proteins
B.
lipids
C.
DNA
D.
RNA
Ans:
proteins
Explanation :
All viruses contain the following two components: a nucleic acid genome and a protein capsid that covers the genome. Together this is called the nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope. The entire intact virus is called the virion.
[23] Which is used as an Air pollution indicator?
A.
Algae
B.
Fungi
C.
Bacteria
D.
Lichens
Ans:
Lichens
Explanation :
Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.
[24] Which one of the following is a carbohydrate?
A.
Urea
B.
Insulin
C.
Glycine
D.
Glucose
Ans:
Glucose
Explanation :
Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
[25] The source of oxygen in atmosphere is due to -
A.
Photosynthesis
B.
Excretion
C.
Nitrogen fixation
D.
Respiration
Ans:
Photosynthesis
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2
Explanation :
When a mosquito sucks the blood of a person who has malaria parasites in his or her blood, the mosquito picks male and female gametocytes where they undergo a series of changes to become sporozoites. The sporozoites are the infective stages of malaria parasites in the mosquito. This process takes about 10 -14 days depending on environmental temperature.
[10] Approximate number of skeletal muscles is :
A.
500
B.
700
C.
200
D.
206
Ans:
700
Explanation :
There are approximately 640 skeletal muscles within the typical human, and almost every muscle constitutes one part of a pair of identical bilateral muscles, found on both sides, resulting in approximately 320 pairs of muscles. Nevertheless, the exact number is difficult to define because different sources group muscles differently, e.g. regarding what is defined as different parts of a single muscle or as several muscles. Examples range from 640 to 850.
[11] The Ozone layer protects us from:
A.
Cosmic rays
B.
Ultra-Violet rays
C.
Visible rays
D.
Infrared rays
Ans:
Ultra-Violet rays
Explanation :
The ozone layer refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UN) radiation. It absorbs 97-99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.
[12] Children especially in western countries who receive very little sunshine suffer from -
A.
rickets
B.
dermatitis
C.
scurvy
D.
kwashiorkor
Ans:
rickets
Explanation :
Children who receive very little sunshine (source of vitamin D) suffer from rickets, a skeletal disorder that results from a lack of vitamin D. Rickets is most common in children who are between 6 and 36 months old. Rickets has mostly disappeared in developed countries due to the introduction of fortified foods, such as cereals with added vitamin D.
[13] In water treatment plant, use of chloramines ensures -
A.
taste and odour control
B.
weed control in reservoirs
C.
disinfection
D.
removal of permanent hardness
Ans:
disinfection
Explanation :
The particular type of chloramine used in drinking water disinfection is called monochloramine. Chloramine is chiefly a secondary disinfectant that are added to water that has already been disinfected with a primary disinfectant, often chlorine
[14] Which blood vessels have the smallest diameter?
A.
Capillaries
B.
Arterioles
C.
Venules
D.
Lymphatic
Ans:
Capillaries
Explanation :
Blood is carried through the body by Blood Vessels. With the help of perfusion process capillaries supplies blood to the tissues.
[15] Fermentation of milk to curd is due to -
A.
Mycobacterium
B.
Staphylococcus
C.
Lactobacillus
D.
Yeast
Ans:
Lactobacillus
Explanation :
Milk contains a sugar called lactose, a disaccharide (compound sugar) made by the glycosidic bonding between glucose and glactose (monosaccharides). When milk is heated to a temperature of 30-40 degrees centigrade and a small amount of old curd added to it, the lactobacillus in that curd sample gets activated and multiplies. These convert the lactose into lactic acid, which imparts the sour taste to curd.
[16] DOTS is a treatment given to patients suffering from -
A.
Polio
B.
AIDS
C.
Hepatitis
D.
Tuberculosis
Ans:
Tuberculosis
Explanation :
DOTS (Directly Observed Treatment, Short Course), also known as TB-DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. It is the best curative method for treatment of tuberculosis because of its highly efficient and cost-effective strategy.
[17] Magnesium is a constituent metal of -
A.
Chlorophyll molecule
B.
DNA
C.
Mitochondria
D.
Ribosomes
Ans:
Chlorophyll molecule
Explanation :
The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium. This was discovered in 1906 and was the first time that magnesium had been detected in living tissue.
[18] Global warming is expected to result in -
A.
Increase in sea level
B.
Change in crop pattern
C.
Change in coastal line
D.
All of these
Ans:
All of these
Explanation :
Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. It will lead to increase in sea level due to melting of polar ice, desertification leading to changes in crop patters, change in coastal line due to their submergence.
[19] Silk wonns feed on -
A.
Basil leaves
B.
Curry leaves
C.
Rose leaves
D.
Mulberry leaves
Ans:
Mulberry leaves
Explanation :
Silkworms are the larva of a moth (Bombyx mori) native to Asia that spins a cocoon of fine, strong, lustrous fiber that is the source of commercial silk. silkworms feed on the leaves of the mulberries (genus Moms) and sometimes on the Osage orange (Madura pomifera).
[20] Which of the following foods gives instant energy to the athletes?
A.
Cheese
B.
Glucose
C.
Ghee
D.
Vitamins
Ans:
Glucose
Explanation :
During exercise or sports activity, our body relies on glycogen to keep the blood sugar levels stable and thus maintain energy. Glucose gives the body the instant energy it needs to perform at its best.
[21] Trachoma is a disease of the -
A.
Liver
B.
Eyes
C.
Lungs
D.
Kidneys
Ans:
Eyes
Explanation :
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness.
[22] The chemical component that is invariably found in all viruses is -
A.
proteins
B.
lipids
C.
DNA
D.
RNA
Ans:
proteins
Explanation :
All viruses contain the following two components: a nucleic acid genome and a protein capsid that covers the genome. Together this is called the nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope. The entire intact virus is called the virion.
[23] Which is used as an Air pollution indicator?
A.
Algae
B.
Fungi
C.
Bacteria
D.
Lichens
Ans:
Lichens
Explanation :
Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.
[24] Which one of the following is a carbohydrate?
A.
Urea
B.
Insulin
C.
Glycine
D.
Glucose
Ans:
Glucose
Explanation :
Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
[25] The source of oxygen in atmosphere is due to -
A.
Photosynthesis
B.
Excretion
C.
Nitrogen fixation
D.
Respiration
Ans:
Photosynthesis
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2
Explanation :
The ozone layer refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UN) radiation. It absorbs 97-99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.
[12] Children especially in western countries who receive very little sunshine suffer from -
A.
rickets
B.
dermatitis
C.
scurvy
D.
kwashiorkor
Ans:
rickets
Explanation :
Children who receive very little sunshine (source of vitamin D) suffer from rickets, a skeletal disorder that results from a lack of vitamin D. Rickets is most common in children who are between 6 and 36 months old. Rickets has mostly disappeared in developed countries due to the introduction of fortified foods, such as cereals with added vitamin D.
[13] In water treatment plant, use of chloramines ensures -
A.
taste and odour control
B.
weed control in reservoirs
C.
disinfection
D.
removal of permanent hardness
Ans:
disinfection
Explanation :
The particular type of chloramine used in drinking water disinfection is called monochloramine. Chloramine is chiefly a secondary disinfectant that are added to water that has already been disinfected with a primary disinfectant, often chlorine
[14] Which blood vessels have the smallest diameter?
A.
Capillaries
B.
Arterioles
C.
Venules
D.
Lymphatic
Ans:
Capillaries
Explanation :
Blood is carried through the body by Blood Vessels. With the help of perfusion process capillaries supplies blood to the tissues.
[15] Fermentation of milk to curd is due to -
A.
Mycobacterium
B.
Staphylococcus
C.
Lactobacillus
D.
Yeast
Ans:
Lactobacillus
Explanation :
Milk contains a sugar called lactose, a disaccharide (compound sugar) made by the glycosidic bonding between glucose and glactose (monosaccharides). When milk is heated to a temperature of 30-40 degrees centigrade and a small amount of old curd added to it, the lactobacillus in that curd sample gets activated and multiplies. These convert the lactose into lactic acid, which imparts the sour taste to curd.
[16] DOTS is a treatment given to patients suffering from -
A.
Polio
B.
AIDS
C.
Hepatitis
D.
Tuberculosis
Ans:
Tuberculosis
Explanation :
DOTS (Directly Observed Treatment, Short Course), also known as TB-DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. It is the best curative method for treatment of tuberculosis because of its highly efficient and cost-effective strategy.
[17] Magnesium is a constituent metal of -
A.
Chlorophyll molecule
B.
DNA
C.
Mitochondria
D.
Ribosomes
Ans:
Chlorophyll molecule
Explanation :
The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium. This was discovered in 1906 and was the first time that magnesium had been detected in living tissue.
[18] Global warming is expected to result in -
A.
Increase in sea level
B.
Change in crop pattern
C.
Change in coastal line
D.
All of these
Ans:
All of these
Explanation :
Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. It will lead to increase in sea level due to melting of polar ice, desertification leading to changes in crop patters, change in coastal line due to their submergence.
[19] Silk wonns feed on -
A.
Basil leaves
B.
Curry leaves
C.
Rose leaves
D.
Mulberry leaves
Ans:
Mulberry leaves
Explanation :
Silkworms are the larva of a moth (Bombyx mori) native to Asia that spins a cocoon of fine, strong, lustrous fiber that is the source of commercial silk. silkworms feed on the leaves of the mulberries (genus Moms) and sometimes on the Osage orange (Madura pomifera).
[20] Which of the following foods gives instant energy to the athletes?
A.
Cheese
B.
Glucose
C.
Ghee
D.
Vitamins
Ans:
Glucose
Explanation :
During exercise or sports activity, our body relies on glycogen to keep the blood sugar levels stable and thus maintain energy. Glucose gives the body the instant energy it needs to perform at its best.
[21] Trachoma is a disease of the -
A.
Liver
B.
Eyes
C.
Lungs
D.
Kidneys
Ans:
Eyes
Explanation :
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness.
[22] The chemical component that is invariably found in all viruses is -
A.
proteins
B.
lipids
C.
DNA
D.
RNA
Ans:
proteins
Explanation :
All viruses contain the following two components: a nucleic acid genome and a protein capsid that covers the genome. Together this is called the nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope. The entire intact virus is called the virion.
[23] Which is used as an Air pollution indicator?
A.
Algae
B.
Fungi
C.
Bacteria
D.
Lichens
Ans:
Lichens
Explanation :
Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.
[24] Which one of the following is a carbohydrate?
A.
Urea
B.
Insulin
C.
Glycine
D.
Glucose
Ans:
Glucose
Explanation :
Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
[25] The source of oxygen in atmosphere is due to -
A.
Photosynthesis
B.
Excretion
C.
Nitrogen fixation
D.
Respiration
Ans:
Photosynthesis
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2
Explanation :
The particular type of chloramine used in drinking water disinfection is called monochloramine. Chloramine is chiefly a secondary disinfectant that are added to water that has already been disinfected with a primary disinfectant, often chlorine
[14] Which blood vessels have the smallest diameter?
A.
Capillaries
B.
Arterioles
C.
Venules
D.
Lymphatic
Ans:
Capillaries
Explanation :
Blood is carried through the body by Blood Vessels. With the help of perfusion process capillaries supplies blood to the tissues.
[15] Fermentation of milk to curd is due to -
A.
Mycobacterium
B.
Staphylococcus
C.
Lactobacillus
D.
Yeast
Ans:
Lactobacillus
Explanation :
Milk contains a sugar called lactose, a disaccharide (compound sugar) made by the glycosidic bonding between glucose and glactose (monosaccharides). When milk is heated to a temperature of 30-40 degrees centigrade and a small amount of old curd added to it, the lactobacillus in that curd sample gets activated and multiplies. These convert the lactose into lactic acid, which imparts the sour taste to curd.
[16] DOTS is a treatment given to patients suffering from -
A.
Polio
B.
AIDS
C.
Hepatitis
D.
Tuberculosis
Ans:
Tuberculosis
Explanation :
DOTS (Directly Observed Treatment, Short Course), also known as TB-DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. It is the best curative method for treatment of tuberculosis because of its highly efficient and cost-effective strategy.
[17] Magnesium is a constituent metal of -
A.
Chlorophyll molecule
B.
DNA
C.
Mitochondria
D.
Ribosomes
Ans:
Chlorophyll molecule
Explanation :
The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium. This was discovered in 1906 and was the first time that magnesium had been detected in living tissue.
[18] Global warming is expected to result in -
A.
Increase in sea level
B.
Change in crop pattern
C.
Change in coastal line
D.
All of these
Ans:
All of these
Explanation :
Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. It will lead to increase in sea level due to melting of polar ice, desertification leading to changes in crop patters, change in coastal line due to their submergence.
[19] Silk wonns feed on -
A.
Basil leaves
B.
Curry leaves
C.
Rose leaves
D.
Mulberry leaves
Ans:
Mulberry leaves
Explanation :
Silkworms are the larva of a moth (Bombyx mori) native to Asia that spins a cocoon of fine, strong, lustrous fiber that is the source of commercial silk. silkworms feed on the leaves of the mulberries (genus Moms) and sometimes on the Osage orange (Madura pomifera).
[20] Which of the following foods gives instant energy to the athletes?
A.
Cheese
B.
Glucose
C.
Ghee
D.
Vitamins
Ans:
Glucose
Explanation :
During exercise or sports activity, our body relies on glycogen to keep the blood sugar levels stable and thus maintain energy. Glucose gives the body the instant energy it needs to perform at its best.
[21] Trachoma is a disease of the -
A.
Liver
B.
Eyes
C.
Lungs
D.
Kidneys
Ans:
Eyes
Explanation :
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness.
[22] The chemical component that is invariably found in all viruses is -
A.
proteins
B.
lipids
C.
DNA
D.
RNA
Ans:
proteins
Explanation :
All viruses contain the following two components: a nucleic acid genome and a protein capsid that covers the genome. Together this is called the nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope. The entire intact virus is called the virion.
[23] Which is used as an Air pollution indicator?
A.
Algae
B.
Fungi
C.
Bacteria
D.
Lichens
Ans:
Lichens
Explanation :
Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.
[24] Which one of the following is a carbohydrate?
A.
Urea
B.
Insulin
C.
Glycine
D.
Glucose
Ans:
Glucose
Explanation :
Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
[25] The source of oxygen in atmosphere is due to -
A.
Photosynthesis
B.
Excretion
C.
Nitrogen fixation
D.
Respiration
Ans:
Photosynthesis
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2
Explanation :
Milk contains a sugar called lactose, a disaccharide (compound sugar) made by the glycosidic bonding between glucose and glactose (monosaccharides). When milk is heated to a temperature of 30-40 degrees centigrade and a small amount of old curd added to it, the lactobacillus in that curd sample gets activated and multiplies. These convert the lactose into lactic acid, which imparts the sour taste to curd.
[16] DOTS is a treatment given to patients suffering from -
A.
Polio
B.
AIDS
C.
Hepatitis
D.
Tuberculosis
Ans:
Tuberculosis
Explanation :
DOTS (Directly Observed Treatment, Short Course), also known as TB-DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. It is the best curative method for treatment of tuberculosis because of its highly efficient and cost-effective strategy.
[17] Magnesium is a constituent metal of -
A.
Chlorophyll molecule
B.
DNA
C.
Mitochondria
D.
Ribosomes
Ans:
Chlorophyll molecule
Explanation :
The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium. This was discovered in 1906 and was the first time that magnesium had been detected in living tissue.
[18] Global warming is expected to result in -
A.
Increase in sea level
B.
Change in crop pattern
C.
Change in coastal line
D.
All of these
Ans:
All of these
Explanation :
Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. It will lead to increase in sea level due to melting of polar ice, desertification leading to changes in crop patters, change in coastal line due to their submergence.
[19] Silk wonns feed on -
A.
Basil leaves
B.
Curry leaves
C.
Rose leaves
D.
Mulberry leaves
Ans:
Mulberry leaves
Explanation :
Silkworms are the larva of a moth (Bombyx mori) native to Asia that spins a cocoon of fine, strong, lustrous fiber that is the source of commercial silk. silkworms feed on the leaves of the mulberries (genus Moms) and sometimes on the Osage orange (Madura pomifera).
[20] Which of the following foods gives instant energy to the athletes?
A.
Cheese
B.
Glucose
C.
Ghee
D.
Vitamins
Ans:
Glucose
Explanation :
During exercise or sports activity, our body relies on glycogen to keep the blood sugar levels stable and thus maintain energy. Glucose gives the body the instant energy it needs to perform at its best.
[21] Trachoma is a disease of the -
A.
Liver
B.
Eyes
C.
Lungs
D.
Kidneys
Ans:
Eyes
Explanation :
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness.
[22] The chemical component that is invariably found in all viruses is -
A.
proteins
B.
lipids
C.
DNA
D.
RNA
Ans:
proteins
Explanation :
All viruses contain the following two components: a nucleic acid genome and a protein capsid that covers the genome. Together this is called the nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope. The entire intact virus is called the virion.
[23] Which is used as an Air pollution indicator?
A.
Algae
B.
Fungi
C.
Bacteria
D.
Lichens
Ans:
Lichens
Explanation :
Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.
[24] Which one of the following is a carbohydrate?
A.
Urea
B.
Insulin
C.
Glycine
D.
Glucose
Ans:
Glucose
Explanation :
Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
[25] The source of oxygen in atmosphere is due to -
A.
Photosynthesis
B.
Excretion
C.
Nitrogen fixation
D.
Respiration
Ans:
Photosynthesis
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2
Explanation :
The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium. This was discovered in 1906 and was the first time that magnesium had been detected in living tissue.
[18] Global warming is expected to result in -
A.
Increase in sea level
B.
Change in crop pattern
C.
Change in coastal line
D.
All of these
Ans:
All of these
Explanation :
Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. It will lead to increase in sea level due to melting of polar ice, desertification leading to changes in crop patters, change in coastal line due to their submergence.
[19] Silk wonns feed on -
A.
Basil leaves
B.
Curry leaves
C.
Rose leaves
D.
Mulberry leaves
Ans:
Mulberry leaves
Explanation :
Silkworms are the larva of a moth (Bombyx mori) native to Asia that spins a cocoon of fine, strong, lustrous fiber that is the source of commercial silk. silkworms feed on the leaves of the mulberries (genus Moms) and sometimes on the Osage orange (Madura pomifera).
[20] Which of the following foods gives instant energy to the athletes?
A.
Cheese
B.
Glucose
C.
Ghee
D.
Vitamins
Ans:
Glucose
Explanation :
During exercise or sports activity, our body relies on glycogen to keep the blood sugar levels stable and thus maintain energy. Glucose gives the body the instant energy it needs to perform at its best.
[21] Trachoma is a disease of the -
A.
Liver
B.
Eyes
C.
Lungs
D.
Kidneys
Ans:
Eyes
Explanation :
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness.
[22] The chemical component that is invariably found in all viruses is -
A.
proteins
B.
lipids
C.
DNA
D.
RNA
Ans:
proteins
Explanation :
All viruses contain the following two components: a nucleic acid genome and a protein capsid that covers the genome. Together this is called the nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope. The entire intact virus is called the virion.
[23] Which is used as an Air pollution indicator?
A.
Algae
B.
Fungi
C.
Bacteria
D.
Lichens
Ans:
Lichens
Explanation :
Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.
[24] Which one of the following is a carbohydrate?
A.
Urea
B.
Insulin
C.
Glycine
D.
Glucose
Ans:
Glucose
Explanation :
Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
[25] The source of oxygen in atmosphere is due to -
A.
Photosynthesis
B.
Excretion
C.
Nitrogen fixation
D.
Respiration
Ans:
Photosynthesis
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2
Explanation :
Silkworms are the larva of a moth (Bombyx mori) native to Asia that spins a cocoon of fine, strong, lustrous fiber that is the source of commercial silk. silkworms feed on the leaves of the mulberries (genus Moms) and sometimes on the Osage orange (Madura pomifera).
[20] Which of the following foods gives instant energy to the athletes?
A.
Cheese
B.
Glucose
C.
Ghee
D.
Vitamins
Ans:
Glucose
Explanation :
During exercise or sports activity, our body relies on glycogen to keep the blood sugar levels stable and thus maintain energy. Glucose gives the body the instant energy it needs to perform at its best.
[21] Trachoma is a disease of the -
A.
Liver
B.
Eyes
C.
Lungs
D.
Kidneys
Ans:
Eyes
Explanation :
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness.
[22] The chemical component that is invariably found in all viruses is -
A.
proteins
B.
lipids
C.
DNA
D.
RNA
Ans:
proteins
Explanation :
All viruses contain the following two components: a nucleic acid genome and a protein capsid that covers the genome. Together this is called the nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope. The entire intact virus is called the virion.
[23] Which is used as an Air pollution indicator?
A.
Algae
B.
Fungi
C.
Bacteria
D.
Lichens
Ans:
Lichens
Explanation :
Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.
[24] Which one of the following is a carbohydrate?
A.
Urea
B.
Insulin
C.
Glycine
D.
Glucose
Ans:
Glucose
Explanation :
Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
[25] The source of oxygen in atmosphere is due to -
A.
Photosynthesis
B.
Excretion
C.
Nitrogen fixation
D.
Respiration
Ans:
Photosynthesis
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2
Explanation :
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness.
[22] The chemical component that is invariably found in all viruses is -
A.
proteins
B.
lipids
C.
DNA
D.
RNA
Ans:
proteins
Explanation :
All viruses contain the following two components: a nucleic acid genome and a protein capsid that covers the genome. Together this is called the nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope. The entire intact virus is called the virion.
[23] Which is used as an Air pollution indicator?
A.
Algae
B.
Fungi
C.
Bacteria
D.
Lichens
Ans:
Lichens
Explanation :
Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.
[24] Which one of the following is a carbohydrate?
A.
Urea
B.
Insulin
C.
Glycine
D.
Glucose
Ans:
Glucose
Explanation :
Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
[25] The source of oxygen in atmosphere is due to -
A.
Photosynthesis
B.
Excretion
C.
Nitrogen fixation
D.
Respiration
Ans:
Photosynthesis
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2
Explanation :
Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.
[24] Which one of the following is a carbohydrate?
A.
Urea
B.
Insulin
C.
Glycine
D.
Glucose
Ans:
Glucose
Explanation :
Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
[25] The source of oxygen in atmosphere is due to -
A.
Photosynthesis
B.
Excretion
C.
Nitrogen fixation
D.
Respiration
Ans:
Photosynthesis
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2
Explanation :
The main source of atmospheric free oxygen is photosynthesis, which produces sugars and free oxygen from carbon dioxide and water. The organ-isms that carry out photosynthesis include the plant life of the land areas as well as the phytoplankton of the oceans. 6CO2 + 6H2O + energy —> C6H12O6 + 6O2