[1] Which of the following is an endemic species?
A.
Horn bill
B.
Indian Rhino
C.
Pink head duck
D.
Nicobar pigeon
Ans:
Horn bill
Explanation :
The Malabar Grey Hornbill is a hornbill that is endemic to the Western Ghats and associated hills of southern India. They are found mainly in dense forest and around rubber, arecanut or coffee plantations.
[2] The type of tail found in Shark is -
A.
Protocercal
B.
Homocercal
C.
Heterocercal
D.
Diphycercal
Ans:
Heterocercal
Explanation :
Sharks possess a heterocercal caudal fin in which the dorsal portion is usually noticeably larger than the ventral portion. This is because the shark's vertebral column extends into that dorsal portion, providing a greater surface area for muscle attachment.
[3] The Sigmoid Colon is part of -
A.
Small Intestine
B.
Anal Canal
C.
Large Intestine
D.
Ileum
Ans:
Large Intestine
Explanation :
The average length of the sigmoid colon is 25 to 40 cm (10 to 15.75 in). The sigmoid colon is an “S” shaped portion of the large intestine that begins in front of the pelvic brim as a continuation of the descending colon and becomes the rectum at the level of the third sacral vertebrae.
[4] Which of the following plant pigments absorbs in red and far-red region of light?
A.
Carotenoide
B.
Chlorophyll
C.
Phytochrome
D.
elyptochrome
Ans:
Phytochrome
Explanation :
Phytochrorne is a photoreceptor, a pigment that plants use to detect light. It is a protein with a bilin chromophore. It detects mainly red and far-red region of the visible spectrum and regulates germination of seeds.
[5] Air quality depicting PM- 2.5 is more hazardous to -
A.
Archaeological Monuments
B.
National Parks
C.
Botanical Gardens
D.
Old Men and Women
Ans:
Old Men and Women
Explanation :
Fine particles known as PM-10 and PM-2.5 can penetrate deep into the lungs, creating health problems. People with heart or lung diseases, older adults, and children are most likely to have problems because of contact with particle pollution. Short-term exposure to PM among pregnant women has been associated with prematurity and growth retardation.
[6] Human Environment Conference-1972 was held at -
A.
Stockholm
B.
Paris
C.
Geneva
D.
Australia
Ans:
Stockholm
Explanation :
The conference was held in Stockholm, the capital of Sweden, in 1972. The conference is widely recognized as the beginning of modern political and public awareness of global environmental problems.
[7] Which one of the following hormones contains iodine?
A.
Thyroxine
B.
Testosterone
C.
Insulin
D.
Adrenaline
Ans:
Thyroxine
Explanation :
Thyroxine is produced by attaching iodine atoms to the ring structures of this protein's tyrosine residues; thyroxine (T4) contains four iodine atoms
[8] Which among the following parts of a plant is involved in gaseous exchange?
A.
Stomata
B.
Lenticels
C.
Vacuoles
D.
Stomata & Lenticels
Ans:
Stomata & Lenticels
Explanation :
Plants obtain the gasesthey need through their leaves. They require oxygen for respiration and carbon dioxide for photosynthesis.
[9] Which one of the following is the respiratory pigment in man?
A.
Haernocyanin
B.
Haemoerythrin
C.
b-Carotene
D.
Haemoglobin
Ans:
Haemoglobin
Explanation :
A respiratory pigment is a molecule, such as hemoglobin in humans, which increases the oxygen- carrying capacity of the blood. The four most common invertebrate respiratory pigments are hemoglobin, haemocyanin, haemerythrin and chlorocruorin.
[10] Kalaazar is transmitted by -
A.
tsetse fly
B.
housefly
C.
anopheles mosquito
D.
sand fly
Ans:
sand fly
Explanation :
Kala-azar is a chronic and potentially fatal parasitic disease of the viscera (the internal organs, particularly the liver, spleen, bone marrow and lymph nodes) which is transmitted by sand fly bites in parts of Asia (primarily India), Africa (primarily Sudan) and South America. It is transmitted by the bite of female sandflies.
[11] Green manure is obtained from -
A.
Fresh animal excreta
B.
Decomposing green legume plants
C.
Domestic vegetable waste
D.
Oil seed husk cakes
Ans:
Decomposing green legume plants
Explanation :
Green manure is obtained from decomposing green legume plants. In agriculture, green manure is created by leaving uprooted or sown crop parts to wither on a field so that they serve as a mulch and soil amendment. The plants used for green manure are often cover crops grown primarily for this purpose.
[12] The lockjaw is a pathological condition of -
A.
Diphtheria
B.
Polio
C.
Paralysis
D.
Tetanus
Ans:
Tetanus
Explanation :
The lockjaw is a pathological condition of tetanus. Clostridium tetani bacteria are responsible for tetanus. Main symptoms of tetanus spasms of muscles and convulsions, lockjaw.
[13] Which of the following amphibians lacks tongue?
A.
Sphenodon
B.
Salamander
C.
Ichthyophis
D.
Necturus
Ans:
Ichthyophis
Explanation :
Ichthyophis lacks tongue. It is sometimes called the Asian caecilians. It is limbless amphibian.
[14] What is the other name for Vitamin B2?
A.
Thiamine
B.
Haemoglobin
C.
Riboflavin
D.
Dextrose
Ans:
Riboflavin
Explanation :
Riboflavin, also known as vitamin B2 is an easily absorbed colored micronutrient with a key role in maintaining health in humans and animals. It plays a key role in energy metabolism, and for the metabolism of fats, ketone bodies, carbohydrates, and proteins.
[15] Cockroach cannot survive in the water because its respiratory organ is -
A.
Gill
B.
Trachea
C.
Book lung
D.
Pulmonary Sac
Ans:
Trachea
Explanation :
In tetrapod anatomy, the trachea or windpipe, is a tube that connects the pharynx and larynx to the luhgs, allowing the passage of air. It is lined with pseudo-stratified ciliated columnar epithelium cells with goblet cells that produce mucus. This mucus lines the cells of the trachea to trap inhaled foreign particles that the cilia then waft upward toward the larynx and then the pharynx where it can be either swallowed into the stomach or expelled as phlegm.
[16] The example of hermaphrodite animal in which cross fertilization occurs is -
A.
Hydra
B.
Ascaris
C.
Earthworm
D.
Silkworm
Ans:
Hydra
Explanation :
Cross fertilization occurs in Hydra. The spermatozoa released from the testis of one Hydra swim about in water with their tails and finally come into contact with the ovum of another Hydra. Only one spermatozoon penetrates the ovum and fertilizes it. This results in the formation of a zygote which is diploid.
[17] Meningitis is a disease which affects the -
A.
Kidneys
B.
Liver
C.
Heart
D.
Brain
Ans:
Brain
Explanation :
Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria, or other microorganisms, and less commonly by certain drugs.
[18] Number of teeth which are replaced in man are -
A.
12
B.
20
C.
32
D.
16
Ans:
12
Explanation :
Deciduous teeth are the first set of teeth in the growth development of humans and many other mammals. The deciduous teeth are: incisors (4); molars (6); and canine (2). So there are 12 teeth which get replaced by the age of 12 when only permanent teeth remain.
[19] The disease that is caused by virus is -
A.
Typhoid
B.
Cholera
C.
Common cold
D.
Malaria
Ans:
Common cold
Explanation :
The common is a viral infectious disease of the upper respiratory tract which affects primarily the nose. Over 200 viruses are implicated in the cause of the common cold; the rhinoviruses are the most common.
[20] In plants water is absorbed by the root hairs by a process called:
A.
Transpiration
B.
Respiration
C.
Perspiration
D.
Osmosis
Ans:
Osmosis
Explanation :
Plants absorb water from their root hairs on the root via osmosis. It is then transported to other parts of the plant. (through the network of xylem vessels) through a combination of capillary action and "transiprational pull".
[21] Which carbohydrate is used in silvering of mirrors?
A.
Fructose
B.
Sucrose
C.
Glucose
D.
Starch
Ans:
Glucose
Explanation :
Glucose is used in silvering of mirror as a reducing agent. Aldehydes such as glucose reduce Ag+ (aq) ions to metallic silver. They themselves are oxidised to carboxylate ions.
[22] The total number of ear bones is -
A.
2
B.
4
C.
6
D.
8
Ans:
6
Explanation :
There are three bones in each human ear. The small ear bones are arranged in series, and are known as ossicles. Ear bones are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup. Together they form a short chain that crosses the middle ear and transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear.
[23] Which one of the following is the most sensitive Indicator of the health of a community?
A.
Birth rate
B.
Infant mortality rate
C.
Death rate
D.
Maternal mortality rate
Ans:
Infant mortality rate
Explanation :
Infant Mortality Rate (IMR) s most widely accepted as one of the most sensitive indicator of health status of a country/region due to several reasons. The IMR always reflect the overall health scenario of a region/ country. The rate is low in developed countries and high to very high in developing underdeveloped countries. If health infrastructure (preventive and curative infrastructures) of a region of a country is very good, the IMR is always good.
[24] Biodegradable wastes can usually be converted into useful substances with the help of -
A.
bacteria
B.
nuclear proteins
C.
radioactive substances
D.
viruses
Ans:
bacteria
Explanation :
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
[25] In digestion, proteins are converted into -
A.
Fatty acids
B.
Glucose
C.
Amino acids
D.
Maltose
Ans:
Amino acids
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.
Explanation :
The Malabar Grey Hornbill is a hornbill that is endemic to the Western Ghats and associated hills of southern India. They are found mainly in dense forest and around rubber, arecanut or coffee plantations.
[2] The type of tail found in Shark is -
A.
Protocercal
B.
Homocercal
C.
Heterocercal
D.
Diphycercal
Ans:
Heterocercal
Explanation :
Sharks possess a heterocercal caudal fin in which the dorsal portion is usually noticeably larger than the ventral portion. This is because the shark's vertebral column extends into that dorsal portion, providing a greater surface area for muscle attachment.
[3] The Sigmoid Colon is part of -
A.
Small Intestine
B.
Anal Canal
C.
Large Intestine
D.
Ileum
Ans:
Large Intestine
Explanation :
The average length of the sigmoid colon is 25 to 40 cm (10 to 15.75 in). The sigmoid colon is an “S” shaped portion of the large intestine that begins in front of the pelvic brim as a continuation of the descending colon and becomes the rectum at the level of the third sacral vertebrae.
[4] Which of the following plant pigments absorbs in red and far-red region of light?
A.
Carotenoide
B.
Chlorophyll
C.
Phytochrome
D.
elyptochrome
Ans:
Phytochrome
Explanation :
Phytochrorne is a photoreceptor, a pigment that plants use to detect light. It is a protein with a bilin chromophore. It detects mainly red and far-red region of the visible spectrum and regulates germination of seeds.
[5] Air quality depicting PM- 2.5 is more hazardous to -
A.
Archaeological Monuments
B.
National Parks
C.
Botanical Gardens
D.
Old Men and Women
Ans:
Old Men and Women
Explanation :
Fine particles known as PM-10 and PM-2.5 can penetrate deep into the lungs, creating health problems. People with heart or lung diseases, older adults, and children are most likely to have problems because of contact with particle pollution. Short-term exposure to PM among pregnant women has been associated with prematurity and growth retardation.
[6] Human Environment Conference-1972 was held at -
A.
Stockholm
B.
Paris
C.
Geneva
D.
Australia
Ans:
Stockholm
Explanation :
The conference was held in Stockholm, the capital of Sweden, in 1972. The conference is widely recognized as the beginning of modern political and public awareness of global environmental problems.
[7] Which one of the following hormones contains iodine?
A.
Thyroxine
B.
Testosterone
C.
Insulin
D.
Adrenaline
Ans:
Thyroxine
Explanation :
Thyroxine is produced by attaching iodine atoms to the ring structures of this protein's tyrosine residues; thyroxine (T4) contains four iodine atoms
[8] Which among the following parts of a plant is involved in gaseous exchange?
A.
Stomata
B.
Lenticels
C.
Vacuoles
D.
Stomata & Lenticels
Ans:
Stomata & Lenticels
Explanation :
Plants obtain the gasesthey need through their leaves. They require oxygen for respiration and carbon dioxide for photosynthesis.
[9] Which one of the following is the respiratory pigment in man?
A.
Haernocyanin
B.
Haemoerythrin
C.
b-Carotene
D.
Haemoglobin
Ans:
Haemoglobin
Explanation :
A respiratory pigment is a molecule, such as hemoglobin in humans, which increases the oxygen- carrying capacity of the blood. The four most common invertebrate respiratory pigments are hemoglobin, haemocyanin, haemerythrin and chlorocruorin.
[10] Kalaazar is transmitted by -
A.
tsetse fly
B.
housefly
C.
anopheles mosquito
D.
sand fly
Ans:
sand fly
Explanation :
Kala-azar is a chronic and potentially fatal parasitic disease of the viscera (the internal organs, particularly the liver, spleen, bone marrow and lymph nodes) which is transmitted by sand fly bites in parts of Asia (primarily India), Africa (primarily Sudan) and South America. It is transmitted by the bite of female sandflies.
[11] Green manure is obtained from -
A.
Fresh animal excreta
B.
Decomposing green legume plants
C.
Domestic vegetable waste
D.
Oil seed husk cakes
Ans:
Decomposing green legume plants
Explanation :
Green manure is obtained from decomposing green legume plants. In agriculture, green manure is created by leaving uprooted or sown crop parts to wither on a field so that they serve as a mulch and soil amendment. The plants used for green manure are often cover crops grown primarily for this purpose.
[12] The lockjaw is a pathological condition of -
A.
Diphtheria
B.
Polio
C.
Paralysis
D.
Tetanus
Ans:
Tetanus
Explanation :
The lockjaw is a pathological condition of tetanus. Clostridium tetani bacteria are responsible for tetanus. Main symptoms of tetanus spasms of muscles and convulsions, lockjaw.
[13] Which of the following amphibians lacks tongue?
A.
Sphenodon
B.
Salamander
C.
Ichthyophis
D.
Necturus
Ans:
Ichthyophis
Explanation :
Ichthyophis lacks tongue. It is sometimes called the Asian caecilians. It is limbless amphibian.
[14] What is the other name for Vitamin B2?
A.
Thiamine
B.
Haemoglobin
C.
Riboflavin
D.
Dextrose
Ans:
Riboflavin
Explanation :
Riboflavin, also known as vitamin B2 is an easily absorbed colored micronutrient with a key role in maintaining health in humans and animals. It plays a key role in energy metabolism, and for the metabolism of fats, ketone bodies, carbohydrates, and proteins.
[15] Cockroach cannot survive in the water because its respiratory organ is -
A.
Gill
B.
Trachea
C.
Book lung
D.
Pulmonary Sac
Ans:
Trachea
Explanation :
In tetrapod anatomy, the trachea or windpipe, is a tube that connects the pharynx and larynx to the luhgs, allowing the passage of air. It is lined with pseudo-stratified ciliated columnar epithelium cells with goblet cells that produce mucus. This mucus lines the cells of the trachea to trap inhaled foreign particles that the cilia then waft upward toward the larynx and then the pharynx where it can be either swallowed into the stomach or expelled as phlegm.
[16] The example of hermaphrodite animal in which cross fertilization occurs is -
A.
Hydra
B.
Ascaris
C.
Earthworm
D.
Silkworm
Ans:
Hydra
Explanation :
Cross fertilization occurs in Hydra. The spermatozoa released from the testis of one Hydra swim about in water with their tails and finally come into contact with the ovum of another Hydra. Only one spermatozoon penetrates the ovum and fertilizes it. This results in the formation of a zygote which is diploid.
[17] Meningitis is a disease which affects the -
A.
Kidneys
B.
Liver
C.
Heart
D.
Brain
Ans:
Brain
Explanation :
Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria, or other microorganisms, and less commonly by certain drugs.
[18] Number of teeth which are replaced in man are -
A.
12
B.
20
C.
32
D.
16
Ans:
12
Explanation :
Deciduous teeth are the first set of teeth in the growth development of humans and many other mammals. The deciduous teeth are: incisors (4); molars (6); and canine (2). So there are 12 teeth which get replaced by the age of 12 when only permanent teeth remain.
[19] The disease that is caused by virus is -
A.
Typhoid
B.
Cholera
C.
Common cold
D.
Malaria
Ans:
Common cold
Explanation :
The common is a viral infectious disease of the upper respiratory tract which affects primarily the nose. Over 200 viruses are implicated in the cause of the common cold; the rhinoviruses are the most common.
[20] In plants water is absorbed by the root hairs by a process called:
A.
Transpiration
B.
Respiration
C.
Perspiration
D.
Osmosis
Ans:
Osmosis
Explanation :
Plants absorb water from their root hairs on the root via osmosis. It is then transported to other parts of the plant. (through the network of xylem vessels) through a combination of capillary action and "transiprational pull".
[21] Which carbohydrate is used in silvering of mirrors?
A.
Fructose
B.
Sucrose
C.
Glucose
D.
Starch
Ans:
Glucose
Explanation :
Glucose is used in silvering of mirror as a reducing agent. Aldehydes such as glucose reduce Ag+ (aq) ions to metallic silver. They themselves are oxidised to carboxylate ions.
[22] The total number of ear bones is -
A.
2
B.
4
C.
6
D.
8
Ans:
6
Explanation :
There are three bones in each human ear. The small ear bones are arranged in series, and are known as ossicles. Ear bones are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup. Together they form a short chain that crosses the middle ear and transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear.
[23] Which one of the following is the most sensitive Indicator of the health of a community?
A.
Birth rate
B.
Infant mortality rate
C.
Death rate
D.
Maternal mortality rate
Ans:
Infant mortality rate
Explanation :
Infant Mortality Rate (IMR) s most widely accepted as one of the most sensitive indicator of health status of a country/region due to several reasons. The IMR always reflect the overall health scenario of a region/ country. The rate is low in developed countries and high to very high in developing underdeveloped countries. If health infrastructure (preventive and curative infrastructures) of a region of a country is very good, the IMR is always good.
[24] Biodegradable wastes can usually be converted into useful substances with the help of -
A.
bacteria
B.
nuclear proteins
C.
radioactive substances
D.
viruses
Ans:
bacteria
Explanation :
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
[25] In digestion, proteins are converted into -
A.
Fatty acids
B.
Glucose
C.
Amino acids
D.
Maltose
Ans:
Amino acids
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.
Explanation :
The average length of the sigmoid colon is 25 to 40 cm (10 to 15.75 in). The sigmoid colon is an “S” shaped portion of the large intestine that begins in front of the pelvic brim as a continuation of the descending colon and becomes the rectum at the level of the third sacral vertebrae.
[4] Which of the following plant pigments absorbs in red and far-red region of light?
A.
Carotenoide
B.
Chlorophyll
C.
Phytochrome
D.
elyptochrome
Ans:
Phytochrome
Explanation :
Phytochrorne is a photoreceptor, a pigment that plants use to detect light. It is a protein with a bilin chromophore. It detects mainly red and far-red region of the visible spectrum and regulates germination of seeds.
[5] Air quality depicting PM- 2.5 is more hazardous to -
A.
Archaeological Monuments
B.
National Parks
C.
Botanical Gardens
D.
Old Men and Women
Ans:
Old Men and Women
Explanation :
Fine particles known as PM-10 and PM-2.5 can penetrate deep into the lungs, creating health problems. People with heart or lung diseases, older adults, and children are most likely to have problems because of contact with particle pollution. Short-term exposure to PM among pregnant women has been associated with prematurity and growth retardation.
[6] Human Environment Conference-1972 was held at -
A.
Stockholm
B.
Paris
C.
Geneva
D.
Australia
Ans:
Stockholm
Explanation :
The conference was held in Stockholm, the capital of Sweden, in 1972. The conference is widely recognized as the beginning of modern political and public awareness of global environmental problems.
[7] Which one of the following hormones contains iodine?
A.
Thyroxine
B.
Testosterone
C.
Insulin
D.
Adrenaline
Ans:
Thyroxine
Explanation :
Thyroxine is produced by attaching iodine atoms to the ring structures of this protein's tyrosine residues; thyroxine (T4) contains four iodine atoms
[8] Which among the following parts of a plant is involved in gaseous exchange?
A.
Stomata
B.
Lenticels
C.
Vacuoles
D.
Stomata & Lenticels
Ans:
Stomata & Lenticels
Explanation :
Plants obtain the gasesthey need through their leaves. They require oxygen for respiration and carbon dioxide for photosynthesis.
[9] Which one of the following is the respiratory pigment in man?
A.
Haernocyanin
B.
Haemoerythrin
C.
b-Carotene
D.
Haemoglobin
Ans:
Haemoglobin
Explanation :
A respiratory pigment is a molecule, such as hemoglobin in humans, which increases the oxygen- carrying capacity of the blood. The four most common invertebrate respiratory pigments are hemoglobin, haemocyanin, haemerythrin and chlorocruorin.
[10] Kalaazar is transmitted by -
A.
tsetse fly
B.
housefly
C.
anopheles mosquito
D.
sand fly
Ans:
sand fly
Explanation :
Kala-azar is a chronic and potentially fatal parasitic disease of the viscera (the internal organs, particularly the liver, spleen, bone marrow and lymph nodes) which is transmitted by sand fly bites in parts of Asia (primarily India), Africa (primarily Sudan) and South America. It is transmitted by the bite of female sandflies.
[11] Green manure is obtained from -
A.
Fresh animal excreta
B.
Decomposing green legume plants
C.
Domestic vegetable waste
D.
Oil seed husk cakes
Ans:
Decomposing green legume plants
Explanation :
Green manure is obtained from decomposing green legume plants. In agriculture, green manure is created by leaving uprooted or sown crop parts to wither on a field so that they serve as a mulch and soil amendment. The plants used for green manure are often cover crops grown primarily for this purpose.
[12] The lockjaw is a pathological condition of -
A.
Diphtheria
B.
Polio
C.
Paralysis
D.
Tetanus
Ans:
Tetanus
Explanation :
The lockjaw is a pathological condition of tetanus. Clostridium tetani bacteria are responsible for tetanus. Main symptoms of tetanus spasms of muscles and convulsions, lockjaw.
[13] Which of the following amphibians lacks tongue?
A.
Sphenodon
B.
Salamander
C.
Ichthyophis
D.
Necturus
Ans:
Ichthyophis
Explanation :
Ichthyophis lacks tongue. It is sometimes called the Asian caecilians. It is limbless amphibian.
[14] What is the other name for Vitamin B2?
A.
Thiamine
B.
Haemoglobin
C.
Riboflavin
D.
Dextrose
Ans:
Riboflavin
Explanation :
Riboflavin, also known as vitamin B2 is an easily absorbed colored micronutrient with a key role in maintaining health in humans and animals. It plays a key role in energy metabolism, and for the metabolism of fats, ketone bodies, carbohydrates, and proteins.
[15] Cockroach cannot survive in the water because its respiratory organ is -
A.
Gill
B.
Trachea
C.
Book lung
D.
Pulmonary Sac
Ans:
Trachea
Explanation :
In tetrapod anatomy, the trachea or windpipe, is a tube that connects the pharynx and larynx to the luhgs, allowing the passage of air. It is lined with pseudo-stratified ciliated columnar epithelium cells with goblet cells that produce mucus. This mucus lines the cells of the trachea to trap inhaled foreign particles that the cilia then waft upward toward the larynx and then the pharynx where it can be either swallowed into the stomach or expelled as phlegm.
[16] The example of hermaphrodite animal in which cross fertilization occurs is -
A.
Hydra
B.
Ascaris
C.
Earthworm
D.
Silkworm
Ans:
Hydra
Explanation :
Cross fertilization occurs in Hydra. The spermatozoa released from the testis of one Hydra swim about in water with their tails and finally come into contact with the ovum of another Hydra. Only one spermatozoon penetrates the ovum and fertilizes it. This results in the formation of a zygote which is diploid.
[17] Meningitis is a disease which affects the -
A.
Kidneys
B.
Liver
C.
Heart
D.
Brain
Ans:
Brain
Explanation :
Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria, or other microorganisms, and less commonly by certain drugs.
[18] Number of teeth which are replaced in man are -
A.
12
B.
20
C.
32
D.
16
Ans:
12
Explanation :
Deciduous teeth are the first set of teeth in the growth development of humans and many other mammals. The deciduous teeth are: incisors (4); molars (6); and canine (2). So there are 12 teeth which get replaced by the age of 12 when only permanent teeth remain.
[19] The disease that is caused by virus is -
A.
Typhoid
B.
Cholera
C.
Common cold
D.
Malaria
Ans:
Common cold
Explanation :
The common is a viral infectious disease of the upper respiratory tract which affects primarily the nose. Over 200 viruses are implicated in the cause of the common cold; the rhinoviruses are the most common.
[20] In plants water is absorbed by the root hairs by a process called:
A.
Transpiration
B.
Respiration
C.
Perspiration
D.
Osmosis
Ans:
Osmosis
Explanation :
Plants absorb water from their root hairs on the root via osmosis. It is then transported to other parts of the plant. (through the network of xylem vessels) through a combination of capillary action and "transiprational pull".
[21] Which carbohydrate is used in silvering of mirrors?
A.
Fructose
B.
Sucrose
C.
Glucose
D.
Starch
Ans:
Glucose
Explanation :
Glucose is used in silvering of mirror as a reducing agent. Aldehydes such as glucose reduce Ag+ (aq) ions to metallic silver. They themselves are oxidised to carboxylate ions.
[22] The total number of ear bones is -
A.
2
B.
4
C.
6
D.
8
Ans:
6
Explanation :
There are three bones in each human ear. The small ear bones are arranged in series, and are known as ossicles. Ear bones are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup. Together they form a short chain that crosses the middle ear and transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear.
[23] Which one of the following is the most sensitive Indicator of the health of a community?
A.
Birth rate
B.
Infant mortality rate
C.
Death rate
D.
Maternal mortality rate
Ans:
Infant mortality rate
Explanation :
Infant Mortality Rate (IMR) s most widely accepted as one of the most sensitive indicator of health status of a country/region due to several reasons. The IMR always reflect the overall health scenario of a region/ country. The rate is low in developed countries and high to very high in developing underdeveloped countries. If health infrastructure (preventive and curative infrastructures) of a region of a country is very good, the IMR is always good.
[24] Biodegradable wastes can usually be converted into useful substances with the help of -
A.
bacteria
B.
nuclear proteins
C.
radioactive substances
D.
viruses
Ans:
bacteria
Explanation :
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
[25] In digestion, proteins are converted into -
A.
Fatty acids
B.
Glucose
C.
Amino acids
D.
Maltose
Ans:
Amino acids
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.
Explanation :
Fine particles known as PM-10 and PM-2.5 can penetrate deep into the lungs, creating health problems. People with heart or lung diseases, older adults, and children are most likely to have problems because of contact with particle pollution. Short-term exposure to PM among pregnant women has been associated with prematurity and growth retardation.
[6] Human Environment Conference-1972 was held at -
A.
Stockholm
B.
Paris
C.
Geneva
D.
Australia
Ans:
Stockholm
Explanation :
The conference was held in Stockholm, the capital of Sweden, in 1972. The conference is widely recognized as the beginning of modern political and public awareness of global environmental problems.
[7] Which one of the following hormones contains iodine?
A.
Thyroxine
B.
Testosterone
C.
Insulin
D.
Adrenaline
Ans:
Thyroxine
Explanation :
Thyroxine is produced by attaching iodine atoms to the ring structures of this protein's tyrosine residues; thyroxine (T4) contains four iodine atoms
[8] Which among the following parts of a plant is involved in gaseous exchange?
A.
Stomata
B.
Lenticels
C.
Vacuoles
D.
Stomata & Lenticels
Ans:
Stomata & Lenticels
Explanation :
Plants obtain the gasesthey need through their leaves. They require oxygen for respiration and carbon dioxide for photosynthesis.
[9] Which one of the following is the respiratory pigment in man?
A.
Haernocyanin
B.
Haemoerythrin
C.
b-Carotene
D.
Haemoglobin
Ans:
Haemoglobin
Explanation :
A respiratory pigment is a molecule, such as hemoglobin in humans, which increases the oxygen- carrying capacity of the blood. The four most common invertebrate respiratory pigments are hemoglobin, haemocyanin, haemerythrin and chlorocruorin.
[10] Kalaazar is transmitted by -
A.
tsetse fly
B.
housefly
C.
anopheles mosquito
D.
sand fly
Ans:
sand fly
Explanation :
Kala-azar is a chronic and potentially fatal parasitic disease of the viscera (the internal organs, particularly the liver, spleen, bone marrow and lymph nodes) which is transmitted by sand fly bites in parts of Asia (primarily India), Africa (primarily Sudan) and South America. It is transmitted by the bite of female sandflies.
[11] Green manure is obtained from -
A.
Fresh animal excreta
B.
Decomposing green legume plants
C.
Domestic vegetable waste
D.
Oil seed husk cakes
Ans:
Decomposing green legume plants
Explanation :
Green manure is obtained from decomposing green legume plants. In agriculture, green manure is created by leaving uprooted or sown crop parts to wither on a field so that they serve as a mulch and soil amendment. The plants used for green manure are often cover crops grown primarily for this purpose.
[12] The lockjaw is a pathological condition of -
A.
Diphtheria
B.
Polio
C.
Paralysis
D.
Tetanus
Ans:
Tetanus
Explanation :
The lockjaw is a pathological condition of tetanus. Clostridium tetani bacteria are responsible for tetanus. Main symptoms of tetanus spasms of muscles and convulsions, lockjaw.
[13] Which of the following amphibians lacks tongue?
A.
Sphenodon
B.
Salamander
C.
Ichthyophis
D.
Necturus
Ans:
Ichthyophis
Explanation :
Ichthyophis lacks tongue. It is sometimes called the Asian caecilians. It is limbless amphibian.
[14] What is the other name for Vitamin B2?
A.
Thiamine
B.
Haemoglobin
C.
Riboflavin
D.
Dextrose
Ans:
Riboflavin
Explanation :
Riboflavin, also known as vitamin B2 is an easily absorbed colored micronutrient with a key role in maintaining health in humans and animals. It plays a key role in energy metabolism, and for the metabolism of fats, ketone bodies, carbohydrates, and proteins.
[15] Cockroach cannot survive in the water because its respiratory organ is -
A.
Gill
B.
Trachea
C.
Book lung
D.
Pulmonary Sac
Ans:
Trachea
Explanation :
In tetrapod anatomy, the trachea or windpipe, is a tube that connects the pharynx and larynx to the luhgs, allowing the passage of air. It is lined with pseudo-stratified ciliated columnar epithelium cells with goblet cells that produce mucus. This mucus lines the cells of the trachea to trap inhaled foreign particles that the cilia then waft upward toward the larynx and then the pharynx where it can be either swallowed into the stomach or expelled as phlegm.
[16] The example of hermaphrodite animal in which cross fertilization occurs is -
A.
Hydra
B.
Ascaris
C.
Earthworm
D.
Silkworm
Ans:
Hydra
Explanation :
Cross fertilization occurs in Hydra. The spermatozoa released from the testis of one Hydra swim about in water with their tails and finally come into contact with the ovum of another Hydra. Only one spermatozoon penetrates the ovum and fertilizes it. This results in the formation of a zygote which is diploid.
[17] Meningitis is a disease which affects the -
A.
Kidneys
B.
Liver
C.
Heart
D.
Brain
Ans:
Brain
Explanation :
Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria, or other microorganisms, and less commonly by certain drugs.
[18] Number of teeth which are replaced in man are -
A.
12
B.
20
C.
32
D.
16
Ans:
12
Explanation :
Deciduous teeth are the first set of teeth in the growth development of humans and many other mammals. The deciduous teeth are: incisors (4); molars (6); and canine (2). So there are 12 teeth which get replaced by the age of 12 when only permanent teeth remain.
[19] The disease that is caused by virus is -
A.
Typhoid
B.
Cholera
C.
Common cold
D.
Malaria
Ans:
Common cold
Explanation :
The common is a viral infectious disease of the upper respiratory tract which affects primarily the nose. Over 200 viruses are implicated in the cause of the common cold; the rhinoviruses are the most common.
[20] In plants water is absorbed by the root hairs by a process called:
A.
Transpiration
B.
Respiration
C.
Perspiration
D.
Osmosis
Ans:
Osmosis
Explanation :
Plants absorb water from their root hairs on the root via osmosis. It is then transported to other parts of the plant. (through the network of xylem vessels) through a combination of capillary action and "transiprational pull".
[21] Which carbohydrate is used in silvering of mirrors?
A.
Fructose
B.
Sucrose
C.
Glucose
D.
Starch
Ans:
Glucose
Explanation :
Glucose is used in silvering of mirror as a reducing agent. Aldehydes such as glucose reduce Ag+ (aq) ions to metallic silver. They themselves are oxidised to carboxylate ions.
[22] The total number of ear bones is -
A.
2
B.
4
C.
6
D.
8
Ans:
6
Explanation :
There are three bones in each human ear. The small ear bones are arranged in series, and are known as ossicles. Ear bones are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup. Together they form a short chain that crosses the middle ear and transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear.
[23] Which one of the following is the most sensitive Indicator of the health of a community?
A.
Birth rate
B.
Infant mortality rate
C.
Death rate
D.
Maternal mortality rate
Ans:
Infant mortality rate
Explanation :
Infant Mortality Rate (IMR) s most widely accepted as one of the most sensitive indicator of health status of a country/region due to several reasons. The IMR always reflect the overall health scenario of a region/ country. The rate is low in developed countries and high to very high in developing underdeveloped countries. If health infrastructure (preventive and curative infrastructures) of a region of a country is very good, the IMR is always good.
[24] Biodegradable wastes can usually be converted into useful substances with the help of -
A.
bacteria
B.
nuclear proteins
C.
radioactive substances
D.
viruses
Ans:
bacteria
Explanation :
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
[25] In digestion, proteins are converted into -
A.
Fatty acids
B.
Glucose
C.
Amino acids
D.
Maltose
Ans:
Amino acids
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.
Explanation :
Thyroxine is produced by attaching iodine atoms to the ring structures of this protein's tyrosine residues; thyroxine (T4) contains four iodine atoms
[8] Which among the following parts of a plant is involved in gaseous exchange?
A.
Stomata
B.
Lenticels
C.
Vacuoles
D.
Stomata & Lenticels
Ans:
Stomata & Lenticels
Explanation :
Plants obtain the gasesthey need through their leaves. They require oxygen for respiration and carbon dioxide for photosynthesis.
[9] Which one of the following is the respiratory pigment in man?
A.
Haernocyanin
B.
Haemoerythrin
C.
b-Carotene
D.
Haemoglobin
Ans:
Haemoglobin
Explanation :
A respiratory pigment is a molecule, such as hemoglobin in humans, which increases the oxygen- carrying capacity of the blood. The four most common invertebrate respiratory pigments are hemoglobin, haemocyanin, haemerythrin and chlorocruorin.
[10] Kalaazar is transmitted by -
A.
tsetse fly
B.
housefly
C.
anopheles mosquito
D.
sand fly
Ans:
sand fly
Explanation :
Kala-azar is a chronic and potentially fatal parasitic disease of the viscera (the internal organs, particularly the liver, spleen, bone marrow and lymph nodes) which is transmitted by sand fly bites in parts of Asia (primarily India), Africa (primarily Sudan) and South America. It is transmitted by the bite of female sandflies.
[11] Green manure is obtained from -
A.
Fresh animal excreta
B.
Decomposing green legume plants
C.
Domestic vegetable waste
D.
Oil seed husk cakes
Ans:
Decomposing green legume plants
Explanation :
Green manure is obtained from decomposing green legume plants. In agriculture, green manure is created by leaving uprooted or sown crop parts to wither on a field so that they serve as a mulch and soil amendment. The plants used for green manure are often cover crops grown primarily for this purpose.
[12] The lockjaw is a pathological condition of -
A.
Diphtheria
B.
Polio
C.
Paralysis
D.
Tetanus
Ans:
Tetanus
Explanation :
The lockjaw is a pathological condition of tetanus. Clostridium tetani bacteria are responsible for tetanus. Main symptoms of tetanus spasms of muscles and convulsions, lockjaw.
[13] Which of the following amphibians lacks tongue?
A.
Sphenodon
B.
Salamander
C.
Ichthyophis
D.
Necturus
Ans:
Ichthyophis
Explanation :
Ichthyophis lacks tongue. It is sometimes called the Asian caecilians. It is limbless amphibian.
[14] What is the other name for Vitamin B2?
A.
Thiamine
B.
Haemoglobin
C.
Riboflavin
D.
Dextrose
Ans:
Riboflavin
Explanation :
Riboflavin, also known as vitamin B2 is an easily absorbed colored micronutrient with a key role in maintaining health in humans and animals. It plays a key role in energy metabolism, and for the metabolism of fats, ketone bodies, carbohydrates, and proteins.
[15] Cockroach cannot survive in the water because its respiratory organ is -
A.
Gill
B.
Trachea
C.
Book lung
D.
Pulmonary Sac
Ans:
Trachea
Explanation :
In tetrapod anatomy, the trachea or windpipe, is a tube that connects the pharynx and larynx to the luhgs, allowing the passage of air. It is lined with pseudo-stratified ciliated columnar epithelium cells with goblet cells that produce mucus. This mucus lines the cells of the trachea to trap inhaled foreign particles that the cilia then waft upward toward the larynx and then the pharynx where it can be either swallowed into the stomach or expelled as phlegm.
[16] The example of hermaphrodite animal in which cross fertilization occurs is -
A.
Hydra
B.
Ascaris
C.
Earthworm
D.
Silkworm
Ans:
Hydra
Explanation :
Cross fertilization occurs in Hydra. The spermatozoa released from the testis of one Hydra swim about in water with their tails and finally come into contact with the ovum of another Hydra. Only one spermatozoon penetrates the ovum and fertilizes it. This results in the formation of a zygote which is diploid.
[17] Meningitis is a disease which affects the -
A.
Kidneys
B.
Liver
C.
Heart
D.
Brain
Ans:
Brain
Explanation :
Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria, or other microorganisms, and less commonly by certain drugs.
[18] Number of teeth which are replaced in man are -
A.
12
B.
20
C.
32
D.
16
Ans:
12
Explanation :
Deciduous teeth are the first set of teeth in the growth development of humans and many other mammals. The deciduous teeth are: incisors (4); molars (6); and canine (2). So there are 12 teeth which get replaced by the age of 12 when only permanent teeth remain.
[19] The disease that is caused by virus is -
A.
Typhoid
B.
Cholera
C.
Common cold
D.
Malaria
Ans:
Common cold
Explanation :
The common is a viral infectious disease of the upper respiratory tract which affects primarily the nose. Over 200 viruses are implicated in the cause of the common cold; the rhinoviruses are the most common.
[20] In plants water is absorbed by the root hairs by a process called:
A.
Transpiration
B.
Respiration
C.
Perspiration
D.
Osmosis
Ans:
Osmosis
Explanation :
Plants absorb water from their root hairs on the root via osmosis. It is then transported to other parts of the plant. (through the network of xylem vessels) through a combination of capillary action and "transiprational pull".
[21] Which carbohydrate is used in silvering of mirrors?
A.
Fructose
B.
Sucrose
C.
Glucose
D.
Starch
Ans:
Glucose
Explanation :
Glucose is used in silvering of mirror as a reducing agent. Aldehydes such as glucose reduce Ag+ (aq) ions to metallic silver. They themselves are oxidised to carboxylate ions.
[22] The total number of ear bones is -
A.
2
B.
4
C.
6
D.
8
Ans:
6
Explanation :
There are three bones in each human ear. The small ear bones are arranged in series, and are known as ossicles. Ear bones are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup. Together they form a short chain that crosses the middle ear and transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear.
[23] Which one of the following is the most sensitive Indicator of the health of a community?
A.
Birth rate
B.
Infant mortality rate
C.
Death rate
D.
Maternal mortality rate
Ans:
Infant mortality rate
Explanation :
Infant Mortality Rate (IMR) s most widely accepted as one of the most sensitive indicator of health status of a country/region due to several reasons. The IMR always reflect the overall health scenario of a region/ country. The rate is low in developed countries and high to very high in developing underdeveloped countries. If health infrastructure (preventive and curative infrastructures) of a region of a country is very good, the IMR is always good.
[24] Biodegradable wastes can usually be converted into useful substances with the help of -
A.
bacteria
B.
nuclear proteins
C.
radioactive substances
D.
viruses
Ans:
bacteria
Explanation :
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
[25] In digestion, proteins are converted into -
A.
Fatty acids
B.
Glucose
C.
Amino acids
D.
Maltose
Ans:
Amino acids
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.
Explanation :
A respiratory pigment is a molecule, such as hemoglobin in humans, which increases the oxygen- carrying capacity of the blood. The four most common invertebrate respiratory pigments are hemoglobin, haemocyanin, haemerythrin and chlorocruorin.
[10] Kalaazar is transmitted by -
A.
tsetse fly
B.
housefly
C.
anopheles mosquito
D.
sand fly
Ans:
sand fly
Explanation :
Kala-azar is a chronic and potentially fatal parasitic disease of the viscera (the internal organs, particularly the liver, spleen, bone marrow and lymph nodes) which is transmitted by sand fly bites in parts of Asia (primarily India), Africa (primarily Sudan) and South America. It is transmitted by the bite of female sandflies.
[11] Green manure is obtained from -
A.
Fresh animal excreta
B.
Decomposing green legume plants
C.
Domestic vegetable waste
D.
Oil seed husk cakes
Ans:
Decomposing green legume plants
Explanation :
Green manure is obtained from decomposing green legume plants. In agriculture, green manure is created by leaving uprooted or sown crop parts to wither on a field so that they serve as a mulch and soil amendment. The plants used for green manure are often cover crops grown primarily for this purpose.
[12] The lockjaw is a pathological condition of -
A.
Diphtheria
B.
Polio
C.
Paralysis
D.
Tetanus
Ans:
Tetanus
Explanation :
The lockjaw is a pathological condition of tetanus. Clostridium tetani bacteria are responsible for tetanus. Main symptoms of tetanus spasms of muscles and convulsions, lockjaw.
[13] Which of the following amphibians lacks tongue?
A.
Sphenodon
B.
Salamander
C.
Ichthyophis
D.
Necturus
Ans:
Ichthyophis
Explanation :
Ichthyophis lacks tongue. It is sometimes called the Asian caecilians. It is limbless amphibian.
[14] What is the other name for Vitamin B2?
A.
Thiamine
B.
Haemoglobin
C.
Riboflavin
D.
Dextrose
Ans:
Riboflavin
Explanation :
Riboflavin, also known as vitamin B2 is an easily absorbed colored micronutrient with a key role in maintaining health in humans and animals. It plays a key role in energy metabolism, and for the metabolism of fats, ketone bodies, carbohydrates, and proteins.
[15] Cockroach cannot survive in the water because its respiratory organ is -
A.
Gill
B.
Trachea
C.
Book lung
D.
Pulmonary Sac
Ans:
Trachea
Explanation :
In tetrapod anatomy, the trachea or windpipe, is a tube that connects the pharynx and larynx to the luhgs, allowing the passage of air. It is lined with pseudo-stratified ciliated columnar epithelium cells with goblet cells that produce mucus. This mucus lines the cells of the trachea to trap inhaled foreign particles that the cilia then waft upward toward the larynx and then the pharynx where it can be either swallowed into the stomach or expelled as phlegm.
[16] The example of hermaphrodite animal in which cross fertilization occurs is -
A.
Hydra
B.
Ascaris
C.
Earthworm
D.
Silkworm
Ans:
Hydra
Explanation :
Cross fertilization occurs in Hydra. The spermatozoa released from the testis of one Hydra swim about in water with their tails and finally come into contact with the ovum of another Hydra. Only one spermatozoon penetrates the ovum and fertilizes it. This results in the formation of a zygote which is diploid.
[17] Meningitis is a disease which affects the -
A.
Kidneys
B.
Liver
C.
Heart
D.
Brain
Ans:
Brain
Explanation :
Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria, or other microorganisms, and less commonly by certain drugs.
[18] Number of teeth which are replaced in man are -
A.
12
B.
20
C.
32
D.
16
Ans:
12
Explanation :
Deciduous teeth are the first set of teeth in the growth development of humans and many other mammals. The deciduous teeth are: incisors (4); molars (6); and canine (2). So there are 12 teeth which get replaced by the age of 12 when only permanent teeth remain.
[19] The disease that is caused by virus is -
A.
Typhoid
B.
Cholera
C.
Common cold
D.
Malaria
Ans:
Common cold
Explanation :
The common is a viral infectious disease of the upper respiratory tract which affects primarily the nose. Over 200 viruses are implicated in the cause of the common cold; the rhinoviruses are the most common.
[20] In plants water is absorbed by the root hairs by a process called:
A.
Transpiration
B.
Respiration
C.
Perspiration
D.
Osmosis
Ans:
Osmosis
Explanation :
Plants absorb water from their root hairs on the root via osmosis. It is then transported to other parts of the plant. (through the network of xylem vessels) through a combination of capillary action and "transiprational pull".
[21] Which carbohydrate is used in silvering of mirrors?
A.
Fructose
B.
Sucrose
C.
Glucose
D.
Starch
Ans:
Glucose
Explanation :
Glucose is used in silvering of mirror as a reducing agent. Aldehydes such as glucose reduce Ag+ (aq) ions to metallic silver. They themselves are oxidised to carboxylate ions.
[22] The total number of ear bones is -
A.
2
B.
4
C.
6
D.
8
Ans:
6
Explanation :
There are three bones in each human ear. The small ear bones are arranged in series, and are known as ossicles. Ear bones are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup. Together they form a short chain that crosses the middle ear and transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear.
[23] Which one of the following is the most sensitive Indicator of the health of a community?
A.
Birth rate
B.
Infant mortality rate
C.
Death rate
D.
Maternal mortality rate
Ans:
Infant mortality rate
Explanation :
Infant Mortality Rate (IMR) s most widely accepted as one of the most sensitive indicator of health status of a country/region due to several reasons. The IMR always reflect the overall health scenario of a region/ country. The rate is low in developed countries and high to very high in developing underdeveloped countries. If health infrastructure (preventive and curative infrastructures) of a region of a country is very good, the IMR is always good.
[24] Biodegradable wastes can usually be converted into useful substances with the help of -
A.
bacteria
B.
nuclear proteins
C.
radioactive substances
D.
viruses
Ans:
bacteria
Explanation :
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
[25] In digestion, proteins are converted into -
A.
Fatty acids
B.
Glucose
C.
Amino acids
D.
Maltose
Ans:
Amino acids
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.
Explanation :
Green manure is obtained from decomposing green legume plants. In agriculture, green manure is created by leaving uprooted or sown crop parts to wither on a field so that they serve as a mulch and soil amendment. The plants used for green manure are often cover crops grown primarily for this purpose.
[12] The lockjaw is a pathological condition of -
A.
Diphtheria
B.
Polio
C.
Paralysis
D.
Tetanus
Ans:
Tetanus
Explanation :
The lockjaw is a pathological condition of tetanus. Clostridium tetani bacteria are responsible for tetanus. Main symptoms of tetanus spasms of muscles and convulsions, lockjaw.
[13] Which of the following amphibians lacks tongue?
A.
Sphenodon
B.
Salamander
C.
Ichthyophis
D.
Necturus
Ans:
Ichthyophis
Explanation :
Ichthyophis lacks tongue. It is sometimes called the Asian caecilians. It is limbless amphibian.
[14] What is the other name for Vitamin B2?
A.
Thiamine
B.
Haemoglobin
C.
Riboflavin
D.
Dextrose
Ans:
Riboflavin
Explanation :
Riboflavin, also known as vitamin B2 is an easily absorbed colored micronutrient with a key role in maintaining health in humans and animals. It plays a key role in energy metabolism, and for the metabolism of fats, ketone bodies, carbohydrates, and proteins.
[15] Cockroach cannot survive in the water because its respiratory organ is -
A.
Gill
B.
Trachea
C.
Book lung
D.
Pulmonary Sac
Ans:
Trachea
Explanation :
In tetrapod anatomy, the trachea or windpipe, is a tube that connects the pharynx and larynx to the luhgs, allowing the passage of air. It is lined with pseudo-stratified ciliated columnar epithelium cells with goblet cells that produce mucus. This mucus lines the cells of the trachea to trap inhaled foreign particles that the cilia then waft upward toward the larynx and then the pharynx where it can be either swallowed into the stomach or expelled as phlegm.
[16] The example of hermaphrodite animal in which cross fertilization occurs is -
A.
Hydra
B.
Ascaris
C.
Earthworm
D.
Silkworm
Ans:
Hydra
Explanation :
Cross fertilization occurs in Hydra. The spermatozoa released from the testis of one Hydra swim about in water with their tails and finally come into contact with the ovum of another Hydra. Only one spermatozoon penetrates the ovum and fertilizes it. This results in the formation of a zygote which is diploid.
[17] Meningitis is a disease which affects the -
A.
Kidneys
B.
Liver
C.
Heart
D.
Brain
Ans:
Brain
Explanation :
Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria, or other microorganisms, and less commonly by certain drugs.
[18] Number of teeth which are replaced in man are -
A.
12
B.
20
C.
32
D.
16
Ans:
12
Explanation :
Deciduous teeth are the first set of teeth in the growth development of humans and many other mammals. The deciduous teeth are: incisors (4); molars (6); and canine (2). So there are 12 teeth which get replaced by the age of 12 when only permanent teeth remain.
[19] The disease that is caused by virus is -
A.
Typhoid
B.
Cholera
C.
Common cold
D.
Malaria
Ans:
Common cold
Explanation :
The common is a viral infectious disease of the upper respiratory tract which affects primarily the nose. Over 200 viruses are implicated in the cause of the common cold; the rhinoviruses are the most common.
[20] In plants water is absorbed by the root hairs by a process called:
A.
Transpiration
B.
Respiration
C.
Perspiration
D.
Osmosis
Ans:
Osmosis
Explanation :
Plants absorb water from their root hairs on the root via osmosis. It is then transported to other parts of the plant. (through the network of xylem vessels) through a combination of capillary action and "transiprational pull".
[21] Which carbohydrate is used in silvering of mirrors?
A.
Fructose
B.
Sucrose
C.
Glucose
D.
Starch
Ans:
Glucose
Explanation :
Glucose is used in silvering of mirror as a reducing agent. Aldehydes such as glucose reduce Ag+ (aq) ions to metallic silver. They themselves are oxidised to carboxylate ions.
[22] The total number of ear bones is -
A.
2
B.
4
C.
6
D.
8
Ans:
6
Explanation :
There are three bones in each human ear. The small ear bones are arranged in series, and are known as ossicles. Ear bones are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup. Together they form a short chain that crosses the middle ear and transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear.
[23] Which one of the following is the most sensitive Indicator of the health of a community?
A.
Birth rate
B.
Infant mortality rate
C.
Death rate
D.
Maternal mortality rate
Ans:
Infant mortality rate
Explanation :
Infant Mortality Rate (IMR) s most widely accepted as one of the most sensitive indicator of health status of a country/region due to several reasons. The IMR always reflect the overall health scenario of a region/ country. The rate is low in developed countries and high to very high in developing underdeveloped countries. If health infrastructure (preventive and curative infrastructures) of a region of a country is very good, the IMR is always good.
[24] Biodegradable wastes can usually be converted into useful substances with the help of -
A.
bacteria
B.
nuclear proteins
C.
radioactive substances
D.
viruses
Ans:
bacteria
Explanation :
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
[25] In digestion, proteins are converted into -
A.
Fatty acids
B.
Glucose
C.
Amino acids
D.
Maltose
Ans:
Amino acids
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.
Explanation :
Ichthyophis lacks tongue. It is sometimes called the Asian caecilians. It is limbless amphibian.
[14] What is the other name for Vitamin B2?
A.
Thiamine
B.
Haemoglobin
C.
Riboflavin
D.
Dextrose
Ans:
Riboflavin
Explanation :
Riboflavin, also known as vitamin B2 is an easily absorbed colored micronutrient with a key role in maintaining health in humans and animals. It plays a key role in energy metabolism, and for the metabolism of fats, ketone bodies, carbohydrates, and proteins.
[15] Cockroach cannot survive in the water because its respiratory organ is -
A.
Gill
B.
Trachea
C.
Book lung
D.
Pulmonary Sac
Ans:
Trachea
Explanation :
In tetrapod anatomy, the trachea or windpipe, is a tube that connects the pharynx and larynx to the luhgs, allowing the passage of air. It is lined with pseudo-stratified ciliated columnar epithelium cells with goblet cells that produce mucus. This mucus lines the cells of the trachea to trap inhaled foreign particles that the cilia then waft upward toward the larynx and then the pharynx where it can be either swallowed into the stomach or expelled as phlegm.
[16] The example of hermaphrodite animal in which cross fertilization occurs is -
A.
Hydra
B.
Ascaris
C.
Earthworm
D.
Silkworm
Ans:
Hydra
Explanation :
Cross fertilization occurs in Hydra. The spermatozoa released from the testis of one Hydra swim about in water with their tails and finally come into contact with the ovum of another Hydra. Only one spermatozoon penetrates the ovum and fertilizes it. This results in the formation of a zygote which is diploid.
[17] Meningitis is a disease which affects the -
A.
Kidneys
B.
Liver
C.
Heart
D.
Brain
Ans:
Brain
Explanation :
Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria, or other microorganisms, and less commonly by certain drugs.
[18] Number of teeth which are replaced in man are -
A.
12
B.
20
C.
32
D.
16
Ans:
12
Explanation :
Deciduous teeth are the first set of teeth in the growth development of humans and many other mammals. The deciduous teeth are: incisors (4); molars (6); and canine (2). So there are 12 teeth which get replaced by the age of 12 when only permanent teeth remain.
[19] The disease that is caused by virus is -
A.
Typhoid
B.
Cholera
C.
Common cold
D.
Malaria
Ans:
Common cold
Explanation :
The common is a viral infectious disease of the upper respiratory tract which affects primarily the nose. Over 200 viruses are implicated in the cause of the common cold; the rhinoviruses are the most common.
[20] In plants water is absorbed by the root hairs by a process called:
A.
Transpiration
B.
Respiration
C.
Perspiration
D.
Osmosis
Ans:
Osmosis
Explanation :
Plants absorb water from their root hairs on the root via osmosis. It is then transported to other parts of the plant. (through the network of xylem vessels) through a combination of capillary action and "transiprational pull".
[21] Which carbohydrate is used in silvering of mirrors?
A.
Fructose
B.
Sucrose
C.
Glucose
D.
Starch
Ans:
Glucose
Explanation :
Glucose is used in silvering of mirror as a reducing agent. Aldehydes such as glucose reduce Ag+ (aq) ions to metallic silver. They themselves are oxidised to carboxylate ions.
[22] The total number of ear bones is -
A.
2
B.
4
C.
6
D.
8
Ans:
6
Explanation :
There are three bones in each human ear. The small ear bones are arranged in series, and are known as ossicles. Ear bones are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup. Together they form a short chain that crosses the middle ear and transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear.
[23] Which one of the following is the most sensitive Indicator of the health of a community?
A.
Birth rate
B.
Infant mortality rate
C.
Death rate
D.
Maternal mortality rate
Ans:
Infant mortality rate
Explanation :
Infant Mortality Rate (IMR) s most widely accepted as one of the most sensitive indicator of health status of a country/region due to several reasons. The IMR always reflect the overall health scenario of a region/ country. The rate is low in developed countries and high to very high in developing underdeveloped countries. If health infrastructure (preventive and curative infrastructures) of a region of a country is very good, the IMR is always good.
[24] Biodegradable wastes can usually be converted into useful substances with the help of -
A.
bacteria
B.
nuclear proteins
C.
radioactive substances
D.
viruses
Ans:
bacteria
Explanation :
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
[25] In digestion, proteins are converted into -
A.
Fatty acids
B.
Glucose
C.
Amino acids
D.
Maltose
Ans:
Amino acids
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.
Explanation :
In tetrapod anatomy, the trachea or windpipe, is a tube that connects the pharynx and larynx to the luhgs, allowing the passage of air. It is lined with pseudo-stratified ciliated columnar epithelium cells with goblet cells that produce mucus. This mucus lines the cells of the trachea to trap inhaled foreign particles that the cilia then waft upward toward the larynx and then the pharynx where it can be either swallowed into the stomach or expelled as phlegm.
[16] The example of hermaphrodite animal in which cross fertilization occurs is -
A.
Hydra
B.
Ascaris
C.
Earthworm
D.
Silkworm
Ans:
Hydra
Explanation :
Cross fertilization occurs in Hydra. The spermatozoa released from the testis of one Hydra swim about in water with their tails and finally come into contact with the ovum of another Hydra. Only one spermatozoon penetrates the ovum and fertilizes it. This results in the formation of a zygote which is diploid.
[17] Meningitis is a disease which affects the -
A.
Kidneys
B.
Liver
C.
Heart
D.
Brain
Ans:
Brain
Explanation :
Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria, or other microorganisms, and less commonly by certain drugs.
[18] Number of teeth which are replaced in man are -
A.
12
B.
20
C.
32
D.
16
Ans:
12
Explanation :
Deciduous teeth are the first set of teeth in the growth development of humans and many other mammals. The deciduous teeth are: incisors (4); molars (6); and canine (2). So there are 12 teeth which get replaced by the age of 12 when only permanent teeth remain.
[19] The disease that is caused by virus is -
A.
Typhoid
B.
Cholera
C.
Common cold
D.
Malaria
Ans:
Common cold
Explanation :
The common is a viral infectious disease of the upper respiratory tract which affects primarily the nose. Over 200 viruses are implicated in the cause of the common cold; the rhinoviruses are the most common.
[20] In plants water is absorbed by the root hairs by a process called:
A.
Transpiration
B.
Respiration
C.
Perspiration
D.
Osmosis
Ans:
Osmosis
Explanation :
Plants absorb water from their root hairs on the root via osmosis. It is then transported to other parts of the plant. (through the network of xylem vessels) through a combination of capillary action and "transiprational pull".
[21] Which carbohydrate is used in silvering of mirrors?
A.
Fructose
B.
Sucrose
C.
Glucose
D.
Starch
Ans:
Glucose
Explanation :
Glucose is used in silvering of mirror as a reducing agent. Aldehydes such as glucose reduce Ag+ (aq) ions to metallic silver. They themselves are oxidised to carboxylate ions.
[22] The total number of ear bones is -
A.
2
B.
4
C.
6
D.
8
Ans:
6
Explanation :
There are three bones in each human ear. The small ear bones are arranged in series, and are known as ossicles. Ear bones are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup. Together they form a short chain that crosses the middle ear and transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear.
[23] Which one of the following is the most sensitive Indicator of the health of a community?
A.
Birth rate
B.
Infant mortality rate
C.
Death rate
D.
Maternal mortality rate
Ans:
Infant mortality rate
Explanation :
Infant Mortality Rate (IMR) s most widely accepted as one of the most sensitive indicator of health status of a country/region due to several reasons. The IMR always reflect the overall health scenario of a region/ country. The rate is low in developed countries and high to very high in developing underdeveloped countries. If health infrastructure (preventive and curative infrastructures) of a region of a country is very good, the IMR is always good.
[24] Biodegradable wastes can usually be converted into useful substances with the help of -
A.
bacteria
B.
nuclear proteins
C.
radioactive substances
D.
viruses
Ans:
bacteria
Explanation :
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
[25] In digestion, proteins are converted into -
A.
Fatty acids
B.
Glucose
C.
Amino acids
D.
Maltose
Ans:
Amino acids
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.
Explanation :
Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria, or other microorganisms, and less commonly by certain drugs.
[18] Number of teeth which are replaced in man are -
A.
12
B.
20
C.
32
D.
16
Ans:
12
Explanation :
Deciduous teeth are the first set of teeth in the growth development of humans and many other mammals. The deciduous teeth are: incisors (4); molars (6); and canine (2). So there are 12 teeth which get replaced by the age of 12 when only permanent teeth remain.
[19] The disease that is caused by virus is -
A.
Typhoid
B.
Cholera
C.
Common cold
D.
Malaria
Ans:
Common cold
Explanation :
The common is a viral infectious disease of the upper respiratory tract which affects primarily the nose. Over 200 viruses are implicated in the cause of the common cold; the rhinoviruses are the most common.
[20] In plants water is absorbed by the root hairs by a process called:
A.
Transpiration
B.
Respiration
C.
Perspiration
D.
Osmosis
Ans:
Osmosis
Explanation :
Plants absorb water from their root hairs on the root via osmosis. It is then transported to other parts of the plant. (through the network of xylem vessels) through a combination of capillary action and "transiprational pull".
[21] Which carbohydrate is used in silvering of mirrors?
A.
Fructose
B.
Sucrose
C.
Glucose
D.
Starch
Ans:
Glucose
Explanation :
Glucose is used in silvering of mirror as a reducing agent. Aldehydes such as glucose reduce Ag+ (aq) ions to metallic silver. They themselves are oxidised to carboxylate ions.
[22] The total number of ear bones is -
A.
2
B.
4
C.
6
D.
8
Ans:
6
Explanation :
There are three bones in each human ear. The small ear bones are arranged in series, and are known as ossicles. Ear bones are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup. Together they form a short chain that crosses the middle ear and transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear.
[23] Which one of the following is the most sensitive Indicator of the health of a community?
A.
Birth rate
B.
Infant mortality rate
C.
Death rate
D.
Maternal mortality rate
Ans:
Infant mortality rate
Explanation :
Infant Mortality Rate (IMR) s most widely accepted as one of the most sensitive indicator of health status of a country/region due to several reasons. The IMR always reflect the overall health scenario of a region/ country. The rate is low in developed countries and high to very high in developing underdeveloped countries. If health infrastructure (preventive and curative infrastructures) of a region of a country is very good, the IMR is always good.
[24] Biodegradable wastes can usually be converted into useful substances with the help of -
A.
bacteria
B.
nuclear proteins
C.
radioactive substances
D.
viruses
Ans:
bacteria
Explanation :
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
[25] In digestion, proteins are converted into -
A.
Fatty acids
B.
Glucose
C.
Amino acids
D.
Maltose
Ans:
Amino acids
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.
Explanation :
The common is a viral infectious disease of the upper respiratory tract which affects primarily the nose. Over 200 viruses are implicated in the cause of the common cold; the rhinoviruses are the most common.
[20] In plants water is absorbed by the root hairs by a process called:
A.
Transpiration
B.
Respiration
C.
Perspiration
D.
Osmosis
Ans:
Osmosis
Explanation :
Plants absorb water from their root hairs on the root via osmosis. It is then transported to other parts of the plant. (through the network of xylem vessels) through a combination of capillary action and "transiprational pull".
[21] Which carbohydrate is used in silvering of mirrors?
A.
Fructose
B.
Sucrose
C.
Glucose
D.
Starch
Ans:
Glucose
Explanation :
Glucose is used in silvering of mirror as a reducing agent. Aldehydes such as glucose reduce Ag+ (aq) ions to metallic silver. They themselves are oxidised to carboxylate ions.
[22] The total number of ear bones is -
A.
2
B.
4
C.
6
D.
8
Ans:
6
Explanation :
There are three bones in each human ear. The small ear bones are arranged in series, and are known as ossicles. Ear bones are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup. Together they form a short chain that crosses the middle ear and transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear.
[23] Which one of the following is the most sensitive Indicator of the health of a community?
A.
Birth rate
B.
Infant mortality rate
C.
Death rate
D.
Maternal mortality rate
Ans:
Infant mortality rate
Explanation :
Infant Mortality Rate (IMR) s most widely accepted as one of the most sensitive indicator of health status of a country/region due to several reasons. The IMR always reflect the overall health scenario of a region/ country. The rate is low in developed countries and high to very high in developing underdeveloped countries. If health infrastructure (preventive and curative infrastructures) of a region of a country is very good, the IMR is always good.
[24] Biodegradable wastes can usually be converted into useful substances with the help of -
A.
bacteria
B.
nuclear proteins
C.
radioactive substances
D.
viruses
Ans:
bacteria
Explanation :
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
[25] In digestion, proteins are converted into -
A.
Fatty acids
B.
Glucose
C.
Amino acids
D.
Maltose
Ans:
Amino acids
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.
Explanation :
Glucose is used in silvering of mirror as a reducing agent. Aldehydes such as glucose reduce Ag+ (aq) ions to metallic silver. They themselves are oxidised to carboxylate ions.
[22] The total number of ear bones is -
A.
2
B.
4
C.
6
D.
8
Ans:
6
Explanation :
There are three bones in each human ear. The small ear bones are arranged in series, and are known as ossicles. Ear bones are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup. Together they form a short chain that crosses the middle ear and transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear.
[23] Which one of the following is the most sensitive Indicator of the health of a community?
A.
Birth rate
B.
Infant mortality rate
C.
Death rate
D.
Maternal mortality rate
Ans:
Infant mortality rate
Explanation :
Infant Mortality Rate (IMR) s most widely accepted as one of the most sensitive indicator of health status of a country/region due to several reasons. The IMR always reflect the overall health scenario of a region/ country. The rate is low in developed countries and high to very high in developing underdeveloped countries. If health infrastructure (preventive and curative infrastructures) of a region of a country is very good, the IMR is always good.
[24] Biodegradable wastes can usually be converted into useful substances with the help of -
A.
bacteria
B.
nuclear proteins
C.
radioactive substances
D.
viruses
Ans:
bacteria
Explanation :
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
[25] In digestion, proteins are converted into -
A.
Fatty acids
B.
Glucose
C.
Amino acids
D.
Maltose
Ans:
Amino acids
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.
Explanation :
Infant Mortality Rate (IMR) s most widely accepted as one of the most sensitive indicator of health status of a country/region due to several reasons. The IMR always reflect the overall health scenario of a region/ country. The rate is low in developed countries and high to very high in developing underdeveloped countries. If health infrastructure (preventive and curative infrastructures) of a region of a country is very good, the IMR is always good.
[24] Biodegradable wastes can usually be converted into useful substances with the help of -
A.
bacteria
B.
nuclear proteins
C.
radioactive substances
D.
viruses
Ans:
bacteria
Explanation :
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
[25] In digestion, proteins are converted into -
A.
Fatty acids
B.
Glucose
C.
Amino acids
D.
Maltose
Ans:
Amino acids
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.
Explanation :
Most proteins are decomposed to single amino acids in digestion. Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid, and continued by trypsin and chymotrypsin in the intestine. Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids.