[1] Which of the following is the parasitic plant?
A.
Marchantia
B.
Kelp
C.
Mushroom
D.
Pteris
Ans:
Mushroom
Explanation :
A parasitic plant is a plant that derives some or all of its nutritional requirements from another living plant.
[2] Cooking oil can be converted into vegetables ghee by the process of -
A.
Oxidation
B.
Hydrogenation
C.
Distillation
D.
Crystallization
Ans:
Hydrogenation
Explanation :
Hydrogenation is a chemical reaction - widely used in the processing of cooking oils and fats - that turns unsaturated fatty acids into saturated ones.
[3] Cellulose is the chief constituent of -
A.
cell wall
B.
cell membrane
C.
secondary wall of xylem
D.
body wall of insects
Ans:
cell wall
Explanation :
In the primary (growing) plant cell wall, the major carbohydrates are cellulose, hemicellulose and pectin. The cell wall in plants provides the most significant difference between plant cells and other eukaryotic cells. The cell wall is rigid (up to many micrometers in thickness) and gives plant cells a much defined shape.
[4] Which one of the following Vitamins helps in maintaining our skin healthy?
A.
Vitamin A
B.
Vitamin C
C.
Vitamin B-12
D.
Vitamin E
Ans:
Vitamin E
Explanation :
Vitamin E is a fat-soluble antioxidant that is essential for the maintenance of healthy skin.
[5] Which one of the following mixtures is homogeneous?
A.
Starch and sugar
B.
Methanol and water
C.
Graphite and charcoal
D.
Calcium carbonate and calcium bicarbonate
Ans:
Methanol and water
Explanation :
A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components throughout any given sample.
[6] Hypoglycemia refers to -
A.
high salt concentration in blood
B.
high blood sugar level
C.
high blood pressure
D.
low sugar level in blood
Ans:
low sugar level in blood
Explanation :
Hypoglycemia is an abnormally diminished content of glucose in the blood. The term literally means "low sugar blood". It can produce a variety of symptoms and effects but the principal problems arise from an inadequate supply of glucose to the brain, resulting in impairment of function.
[7] The primary source of carbohydrates are -
A.
Marine animals
B.
Plants
C.
Coal-tar
D.
Crude oil
Ans:
Plants
Explanation :
Plants are the primary sources of carbohydrates. They produce carbohydrates by photosynthesis which is the source of energy for nearly all life on earth, either directly, through primary production, or indirectly, as the ultimate source of the energy in their food.
[8] Which of the following processes does not increase the amount of carbon dioxide in air?
A.
Breathing
B.
Photosynthesis
C.
Burning of petrol
D.
Aerobic decay of vegetation
Ans:
Photosynthesis
Explanation :
Plants reduce the CO2, because they use it with photosynthesis. They use it to give oxygen and carbohydrates as the final product. It is for this reason that plantation of trees has been stressed by environmentalists.
[9] The vitamin that is most readily manufactured in our bodies is -
A.
vitamin A
B.
vitamin B
C.
vitamin C
D.
vitamin D
Ans:
vitamin D
Explanation :
Vitamin D is not really a vitamin, but a precursor for the most potent steroid hormone in the human body. It can be obtained from exposure to the sun's ultraviolet (UV) radiation, especially during the early morning hours.
[10] Aspartame is the name of a product used by diabetic patients as a sweetening agent. It belongs to the class of —
A.
Carbohydrates
B.
Peptides
C.
Polyhydric alcohols
D.
Alkaloids
Ans:
Peptides
Explanation :
Aspartame is an artificial, non-saccharide sweetener used as a sugar substitute in some foods and beverages. It is a methyl ester of the aspartic acid/phenylalanine dipeptide. Under strongly acidic or alkaline conditions, aspartame may generate methanol by hydrolysis. Under more severe conditions, the peptide bonds are also hydrolyzed, resulting in the free amino acids.
[11] Which one of the following four secretions, is different from the remaining three in regard to its mode of transport from the source gland to the site of action?
A.
Saliva
B.
Sweat
C.
Bile
D.
Epinephrine
Ans:
Bile
Explanation :
Saliva: secreted by the salivary glands; Sweat: achieved by the water-rich secretion of the eccrine glands; Epinephrine: also known as adrenaline is a hormone and a neurotransmitter; and Bile: a bitter- tasting, dark green to yellowish brown fluid, produced by the liver that aids the process of digestion of lipids in the small intestine. Bile is the odd one among all four as it is secreted by liver, while others are secreted by glands.
[12] Which one of the following organs excretes water, fat and various catabolic wastes?
A.
Kidney
B.
Skin
C.
Spleen
D.
Salivary glands
Ans:
Kidney
Explanation :
The kidneys are essential in the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acid-base balance, and regulation of blood pressure (via maintaining salt and water balance). They serve the body as a natural filter of the blood, and remove wastes which are diverted to the urinary bladder.
[13] The animal that do not develop hypertension in spite of heavy intake of salt is:
A.
Sheep
B.
Buffalo
C.
Tiger
D.
Camel
Ans:
Camel
Explanation :
The daily salt intake of camels is eight times that of a typical cow or sheep. Yet, surprisingly, they do not develop high blood pressure. Similarly, their blood sugar levels are twice those of other cud-chewing animals: still they do not develop diabetes.
[14] Activity of an enzyme can be modulated by change of -
A.
pH
B.
Light
C.
Humidity
D.
Rainfall
Ans:
pH
Explanation :
Changes in pH which can accompany metabolic process such as respiration (aerobic glycolysis for example) can alter the conformation of an enzyme and hence enzyme activity. The initial changes are covalent (change in protonation state of the protein) which can lead to an alteration in the delicate balance of forces that affect protein structure
[15] Proteins are digested by -
A.
Proteases
B.
Amylases
C.
Lipases
D.
Nucleases
Ans:
Proteases
Explanation :
The digestion of proteins, take place by enzymes called proteases, which begins in the stomach, where pepsin breaks down some proteins into polypeptides. The end products of protein digestion are amino acids which can be absorbed.
[16] Jaundice is a disease which affects -
A.
Heart
B.
Liver
C.
Spleen
D.
Gail bladder
Ans:
Liver
Explanation :
Jaundice is a yellow discoloration of the skin, mucous membranes, and the whites of the eyes caused by increased amounts of bilirubin in the blood. It is often seen in liver disease such as hepatitis or liver cancer.
[17] Cholesterol is absent in -
A.
Groundnut oil
B.
Butter oil
C.
Butter milk
D.
Ice Cream
Ans:
Groundnut oil
Explanation :
100 g of peanut oil (groundnut oil) contains 17.7 g of saturated fat, 48.3 g of monounsaturated fat, 33.4 g of polyunsaturated fat, and 0 mg of cholesterol. It is fast replacing dairy products due to the absence of cholesterol.
[18] The pollutants which move downward with percolating ground water are called -
A.
Leachates
B.
Pollutates
C.
Earthites
D.
Percolates
Ans:
Leachates
Explanation :
Leachate is any liquid that, in passing through matter, extracts solutes, suspended solids or any other component of the material through which it has passed. In older landfills and those with no membrane between the waste and the underlying geology, leachate is free to egress the waste directly into the groundwater. In such cases high concentrations of leachate are often found in nearby springs and flushes.
[19] Lungs are located in the -
A.
abdominal cavity
B.
pericardial cavity
C.
peritoneal cavity
D.
pleural cavity
Ans:
pleural cavity
Explanation :
In human anatomy, the pleural cavity is the potential space between the two pleura (visceral and parietal) of the lungs.
[20] Which of the following diseases is caused by the consumption of nitrate contaminated food and water?
A.
Minimata disease
B.
Osteoporosis
C.
Blue baby syndrome
D.
Asbestosis
Ans:
Blue baby syndrome
Explanation :
Infants under four months of age that drink water or eat food contaminated with high levels of nitrates or nitrites are particularly at risk for methemoglobinemia, or blue baby syndrome. This can occur if water containing high levels of nitrates is used to prepare infant formula, and very rarely if infants eat nitrate-rich spinach which has broken down into nitrite during storage.
[21] In which one of the following is swim bladder absent?
A.
C utdefish
B.
Bony fish
C.
Cartilaginous fish
D.
Silverfish
Ans:
Cartilaginous fish
Explanation :
The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. The cartilaginous fish (e.g. sharks and rays) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
[22] Which one of the following is the smallest endocrine gland in human body?
A.
Adrenal
B.
Thyroid
C.
Pituitary
D.
Pancreas
Ans:
Pituitary
Explanation :
Pituitary gland, called Master Gland, is the smallest endocrine gland. It controls the general growth of the body and stimulates the primary sex hormones, i.e. ovaries and testes.
[23] A seed can germinate in the absence of -
A.
adequate light
B.
supply of oxygen
C.
suitable moisture
D.
suitable temperature
Ans:
adequate light
Explanation :
Light or darkness can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling.
[24] Normally animals can change the place, but which one of the following animals cannot change the place?
A.
Starfish
B.
Sponge
C.
Hydra
D.
Leech
Ans:
Hydra
Explanation :
Hydras are generally sedentary and sessile.
[25] DNA contains -
A.
Pentose sugar
B.
Hexose sugar
C.
Erythrose sugar
D.
Sedoheptulose sugar
Ans:
Pentose sugar
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.
Explanation :
A parasitic plant is a plant that derives some or all of its nutritional requirements from another living plant.
[2] Cooking oil can be converted into vegetables ghee by the process of -
A.
Oxidation
B.
Hydrogenation
C.
Distillation
D.
Crystallization
Ans:
Hydrogenation
Explanation :
Hydrogenation is a chemical reaction - widely used in the processing of cooking oils and fats - that turns unsaturated fatty acids into saturated ones.
[3] Cellulose is the chief constituent of -
A.
cell wall
B.
cell membrane
C.
secondary wall of xylem
D.
body wall of insects
Ans:
cell wall
Explanation :
In the primary (growing) plant cell wall, the major carbohydrates are cellulose, hemicellulose and pectin. The cell wall in plants provides the most significant difference between plant cells and other eukaryotic cells. The cell wall is rigid (up to many micrometers in thickness) and gives plant cells a much defined shape.
[4] Which one of the following Vitamins helps in maintaining our skin healthy?
A.
Vitamin A
B.
Vitamin C
C.
Vitamin B-12
D.
Vitamin E
Ans:
Vitamin E
Explanation :
Vitamin E is a fat-soluble antioxidant that is essential for the maintenance of healthy skin.
[5] Which one of the following mixtures is homogeneous?
A.
Starch and sugar
B.
Methanol and water
C.
Graphite and charcoal
D.
Calcium carbonate and calcium bicarbonate
Ans:
Methanol and water
Explanation :
A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components throughout any given sample.
[6] Hypoglycemia refers to -
A.
high salt concentration in blood
B.
high blood sugar level
C.
high blood pressure
D.
low sugar level in blood
Ans:
low sugar level in blood
Explanation :
Hypoglycemia is an abnormally diminished content of glucose in the blood. The term literally means "low sugar blood". It can produce a variety of symptoms and effects but the principal problems arise from an inadequate supply of glucose to the brain, resulting in impairment of function.
[7] The primary source of carbohydrates are -
A.
Marine animals
B.
Plants
C.
Coal-tar
D.
Crude oil
Ans:
Plants
Explanation :
Plants are the primary sources of carbohydrates. They produce carbohydrates by photosynthesis which is the source of energy for nearly all life on earth, either directly, through primary production, or indirectly, as the ultimate source of the energy in their food.
[8] Which of the following processes does not increase the amount of carbon dioxide in air?
A.
Breathing
B.
Photosynthesis
C.
Burning of petrol
D.
Aerobic decay of vegetation
Ans:
Photosynthesis
Explanation :
Plants reduce the CO2, because they use it with photosynthesis. They use it to give oxygen and carbohydrates as the final product. It is for this reason that plantation of trees has been stressed by environmentalists.
[9] The vitamin that is most readily manufactured in our bodies is -
A.
vitamin A
B.
vitamin B
C.
vitamin C
D.
vitamin D
Ans:
vitamin D
Explanation :
Vitamin D is not really a vitamin, but a precursor for the most potent steroid hormone in the human body. It can be obtained from exposure to the sun's ultraviolet (UV) radiation, especially during the early morning hours.
[10] Aspartame is the name of a product used by diabetic patients as a sweetening agent. It belongs to the class of —
A.
Carbohydrates
B.
Peptides
C.
Polyhydric alcohols
D.
Alkaloids
Ans:
Peptides
Explanation :
Aspartame is an artificial, non-saccharide sweetener used as a sugar substitute in some foods and beverages. It is a methyl ester of the aspartic acid/phenylalanine dipeptide. Under strongly acidic or alkaline conditions, aspartame may generate methanol by hydrolysis. Under more severe conditions, the peptide bonds are also hydrolyzed, resulting in the free amino acids.
[11] Which one of the following four secretions, is different from the remaining three in regard to its mode of transport from the source gland to the site of action?
A.
Saliva
B.
Sweat
C.
Bile
D.
Epinephrine
Ans:
Bile
Explanation :
Saliva: secreted by the salivary glands; Sweat: achieved by the water-rich secretion of the eccrine glands; Epinephrine: also known as adrenaline is a hormone and a neurotransmitter; and Bile: a bitter- tasting, dark green to yellowish brown fluid, produced by the liver that aids the process of digestion of lipids in the small intestine. Bile is the odd one among all four as it is secreted by liver, while others are secreted by glands.
[12] Which one of the following organs excretes water, fat and various catabolic wastes?
A.
Kidney
B.
Skin
C.
Spleen
D.
Salivary glands
Ans:
Kidney
Explanation :
The kidneys are essential in the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acid-base balance, and regulation of blood pressure (via maintaining salt and water balance). They serve the body as a natural filter of the blood, and remove wastes which are diverted to the urinary bladder.
[13] The animal that do not develop hypertension in spite of heavy intake of salt is:
A.
Sheep
B.
Buffalo
C.
Tiger
D.
Camel
Ans:
Camel
Explanation :
The daily salt intake of camels is eight times that of a typical cow or sheep. Yet, surprisingly, they do not develop high blood pressure. Similarly, their blood sugar levels are twice those of other cud-chewing animals: still they do not develop diabetes.
[14] Activity of an enzyme can be modulated by change of -
A.
pH
B.
Light
C.
Humidity
D.
Rainfall
Ans:
pH
Explanation :
Changes in pH which can accompany metabolic process such as respiration (aerobic glycolysis for example) can alter the conformation of an enzyme and hence enzyme activity. The initial changes are covalent (change in protonation state of the protein) which can lead to an alteration in the delicate balance of forces that affect protein structure
[15] Proteins are digested by -
A.
Proteases
B.
Amylases
C.
Lipases
D.
Nucleases
Ans:
Proteases
Explanation :
The digestion of proteins, take place by enzymes called proteases, which begins in the stomach, where pepsin breaks down some proteins into polypeptides. The end products of protein digestion are amino acids which can be absorbed.
[16] Jaundice is a disease which affects -
A.
Heart
B.
Liver
C.
Spleen
D.
Gail bladder
Ans:
Liver
Explanation :
Jaundice is a yellow discoloration of the skin, mucous membranes, and the whites of the eyes caused by increased amounts of bilirubin in the blood. It is often seen in liver disease such as hepatitis or liver cancer.
[17] Cholesterol is absent in -
A.
Groundnut oil
B.
Butter oil
C.
Butter milk
D.
Ice Cream
Ans:
Groundnut oil
Explanation :
100 g of peanut oil (groundnut oil) contains 17.7 g of saturated fat, 48.3 g of monounsaturated fat, 33.4 g of polyunsaturated fat, and 0 mg of cholesterol. It is fast replacing dairy products due to the absence of cholesterol.
[18] The pollutants which move downward with percolating ground water are called -
A.
Leachates
B.
Pollutates
C.
Earthites
D.
Percolates
Ans:
Leachates
Explanation :
Leachate is any liquid that, in passing through matter, extracts solutes, suspended solids or any other component of the material through which it has passed. In older landfills and those with no membrane between the waste and the underlying geology, leachate is free to egress the waste directly into the groundwater. In such cases high concentrations of leachate are often found in nearby springs and flushes.
[19] Lungs are located in the -
A.
abdominal cavity
B.
pericardial cavity
C.
peritoneal cavity
D.
pleural cavity
Ans:
pleural cavity
Explanation :
In human anatomy, the pleural cavity is the potential space between the two pleura (visceral and parietal) of the lungs.
[20] Which of the following diseases is caused by the consumption of nitrate contaminated food and water?
A.
Minimata disease
B.
Osteoporosis
C.
Blue baby syndrome
D.
Asbestosis
Ans:
Blue baby syndrome
Explanation :
Infants under four months of age that drink water or eat food contaminated with high levels of nitrates or nitrites are particularly at risk for methemoglobinemia, or blue baby syndrome. This can occur if water containing high levels of nitrates is used to prepare infant formula, and very rarely if infants eat nitrate-rich spinach which has broken down into nitrite during storage.
[21] In which one of the following is swim bladder absent?
A.
C utdefish
B.
Bony fish
C.
Cartilaginous fish
D.
Silverfish
Ans:
Cartilaginous fish
Explanation :
The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. The cartilaginous fish (e.g. sharks and rays) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
[22] Which one of the following is the smallest endocrine gland in human body?
A.
Adrenal
B.
Thyroid
C.
Pituitary
D.
Pancreas
Ans:
Pituitary
Explanation :
Pituitary gland, called Master Gland, is the smallest endocrine gland. It controls the general growth of the body and stimulates the primary sex hormones, i.e. ovaries and testes.
[23] A seed can germinate in the absence of -
A.
adequate light
B.
supply of oxygen
C.
suitable moisture
D.
suitable temperature
Ans:
adequate light
Explanation :
Light or darkness can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling.
[24] Normally animals can change the place, but which one of the following animals cannot change the place?
A.
Starfish
B.
Sponge
C.
Hydra
D.
Leech
Ans:
Hydra
Explanation :
Hydras are generally sedentary and sessile.
[25] DNA contains -
A.
Pentose sugar
B.
Hexose sugar
C.
Erythrose sugar
D.
Sedoheptulose sugar
Ans:
Pentose sugar
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.
Explanation :
In the primary (growing) plant cell wall, the major carbohydrates are cellulose, hemicellulose and pectin. The cell wall in plants provides the most significant difference between plant cells and other eukaryotic cells. The cell wall is rigid (up to many micrometers in thickness) and gives plant cells a much defined shape.
[4] Which one of the following Vitamins helps in maintaining our skin healthy?
A.
Vitamin A
B.
Vitamin C
C.
Vitamin B-12
D.
Vitamin E
Ans:
Vitamin E
Explanation :
Vitamin E is a fat-soluble antioxidant that is essential for the maintenance of healthy skin.
[5] Which one of the following mixtures is homogeneous?
A.
Starch and sugar
B.
Methanol and water
C.
Graphite and charcoal
D.
Calcium carbonate and calcium bicarbonate
Ans:
Methanol and water
Explanation :
A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components throughout any given sample.
[6] Hypoglycemia refers to -
A.
high salt concentration in blood
B.
high blood sugar level
C.
high blood pressure
D.
low sugar level in blood
Ans:
low sugar level in blood
Explanation :
Hypoglycemia is an abnormally diminished content of glucose in the blood. The term literally means "low sugar blood". It can produce a variety of symptoms and effects but the principal problems arise from an inadequate supply of glucose to the brain, resulting in impairment of function.
[7] The primary source of carbohydrates are -
A.
Marine animals
B.
Plants
C.
Coal-tar
D.
Crude oil
Ans:
Plants
Explanation :
Plants are the primary sources of carbohydrates. They produce carbohydrates by photosynthesis which is the source of energy for nearly all life on earth, either directly, through primary production, or indirectly, as the ultimate source of the energy in their food.
[8] Which of the following processes does not increase the amount of carbon dioxide in air?
A.
Breathing
B.
Photosynthesis
C.
Burning of petrol
D.
Aerobic decay of vegetation
Ans:
Photosynthesis
Explanation :
Plants reduce the CO2, because they use it with photosynthesis. They use it to give oxygen and carbohydrates as the final product. It is for this reason that plantation of trees has been stressed by environmentalists.
[9] The vitamin that is most readily manufactured in our bodies is -
A.
vitamin A
B.
vitamin B
C.
vitamin C
D.
vitamin D
Ans:
vitamin D
Explanation :
Vitamin D is not really a vitamin, but a precursor for the most potent steroid hormone in the human body. It can be obtained from exposure to the sun's ultraviolet (UV) radiation, especially during the early morning hours.
[10] Aspartame is the name of a product used by diabetic patients as a sweetening agent. It belongs to the class of —
A.
Carbohydrates
B.
Peptides
C.
Polyhydric alcohols
D.
Alkaloids
Ans:
Peptides
Explanation :
Aspartame is an artificial, non-saccharide sweetener used as a sugar substitute in some foods and beverages. It is a methyl ester of the aspartic acid/phenylalanine dipeptide. Under strongly acidic or alkaline conditions, aspartame may generate methanol by hydrolysis. Under more severe conditions, the peptide bonds are also hydrolyzed, resulting in the free amino acids.
[11] Which one of the following four secretions, is different from the remaining three in regard to its mode of transport from the source gland to the site of action?
A.
Saliva
B.
Sweat
C.
Bile
D.
Epinephrine
Ans:
Bile
Explanation :
Saliva: secreted by the salivary glands; Sweat: achieved by the water-rich secretion of the eccrine glands; Epinephrine: also known as adrenaline is a hormone and a neurotransmitter; and Bile: a bitter- tasting, dark green to yellowish brown fluid, produced by the liver that aids the process of digestion of lipids in the small intestine. Bile is the odd one among all four as it is secreted by liver, while others are secreted by glands.
[12] Which one of the following organs excretes water, fat and various catabolic wastes?
A.
Kidney
B.
Skin
C.
Spleen
D.
Salivary glands
Ans:
Kidney
Explanation :
The kidneys are essential in the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acid-base balance, and regulation of blood pressure (via maintaining salt and water balance). They serve the body as a natural filter of the blood, and remove wastes which are diverted to the urinary bladder.
[13] The animal that do not develop hypertension in spite of heavy intake of salt is:
A.
Sheep
B.
Buffalo
C.
Tiger
D.
Camel
Ans:
Camel
Explanation :
The daily salt intake of camels is eight times that of a typical cow or sheep. Yet, surprisingly, they do not develop high blood pressure. Similarly, their blood sugar levels are twice those of other cud-chewing animals: still they do not develop diabetes.
[14] Activity of an enzyme can be modulated by change of -
A.
pH
B.
Light
C.
Humidity
D.
Rainfall
Ans:
pH
Explanation :
Changes in pH which can accompany metabolic process such as respiration (aerobic glycolysis for example) can alter the conformation of an enzyme and hence enzyme activity. The initial changes are covalent (change in protonation state of the protein) which can lead to an alteration in the delicate balance of forces that affect protein structure
[15] Proteins are digested by -
A.
Proteases
B.
Amylases
C.
Lipases
D.
Nucleases
Ans:
Proteases
Explanation :
The digestion of proteins, take place by enzymes called proteases, which begins in the stomach, where pepsin breaks down some proteins into polypeptides. The end products of protein digestion are amino acids which can be absorbed.
[16] Jaundice is a disease which affects -
A.
Heart
B.
Liver
C.
Spleen
D.
Gail bladder
Ans:
Liver
Explanation :
Jaundice is a yellow discoloration of the skin, mucous membranes, and the whites of the eyes caused by increased amounts of bilirubin in the blood. It is often seen in liver disease such as hepatitis or liver cancer.
[17] Cholesterol is absent in -
A.
Groundnut oil
B.
Butter oil
C.
Butter milk
D.
Ice Cream
Ans:
Groundnut oil
Explanation :
100 g of peanut oil (groundnut oil) contains 17.7 g of saturated fat, 48.3 g of monounsaturated fat, 33.4 g of polyunsaturated fat, and 0 mg of cholesterol. It is fast replacing dairy products due to the absence of cholesterol.
[18] The pollutants which move downward with percolating ground water are called -
A.
Leachates
B.
Pollutates
C.
Earthites
D.
Percolates
Ans:
Leachates
Explanation :
Leachate is any liquid that, in passing through matter, extracts solutes, suspended solids or any other component of the material through which it has passed. In older landfills and those with no membrane between the waste and the underlying geology, leachate is free to egress the waste directly into the groundwater. In such cases high concentrations of leachate are often found in nearby springs and flushes.
[19] Lungs are located in the -
A.
abdominal cavity
B.
pericardial cavity
C.
peritoneal cavity
D.
pleural cavity
Ans:
pleural cavity
Explanation :
In human anatomy, the pleural cavity is the potential space between the two pleura (visceral and parietal) of the lungs.
[20] Which of the following diseases is caused by the consumption of nitrate contaminated food and water?
A.
Minimata disease
B.
Osteoporosis
C.
Blue baby syndrome
D.
Asbestosis
Ans:
Blue baby syndrome
Explanation :
Infants under four months of age that drink water or eat food contaminated with high levels of nitrates or nitrites are particularly at risk for methemoglobinemia, or blue baby syndrome. This can occur if water containing high levels of nitrates is used to prepare infant formula, and very rarely if infants eat nitrate-rich spinach which has broken down into nitrite during storage.
[21] In which one of the following is swim bladder absent?
A.
C utdefish
B.
Bony fish
C.
Cartilaginous fish
D.
Silverfish
Ans:
Cartilaginous fish
Explanation :
The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. The cartilaginous fish (e.g. sharks and rays) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
[22] Which one of the following is the smallest endocrine gland in human body?
A.
Adrenal
B.
Thyroid
C.
Pituitary
D.
Pancreas
Ans:
Pituitary
Explanation :
Pituitary gland, called Master Gland, is the smallest endocrine gland. It controls the general growth of the body and stimulates the primary sex hormones, i.e. ovaries and testes.
[23] A seed can germinate in the absence of -
A.
adequate light
B.
supply of oxygen
C.
suitable moisture
D.
suitable temperature
Ans:
adequate light
Explanation :
Light or darkness can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling.
[24] Normally animals can change the place, but which one of the following animals cannot change the place?
A.
Starfish
B.
Sponge
C.
Hydra
D.
Leech
Ans:
Hydra
Explanation :
Hydras are generally sedentary and sessile.
[25] DNA contains -
A.
Pentose sugar
B.
Hexose sugar
C.
Erythrose sugar
D.
Sedoheptulose sugar
Ans:
Pentose sugar
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.
Explanation :
A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components throughout any given sample.
[6] Hypoglycemia refers to -
A.
high salt concentration in blood
B.
high blood sugar level
C.
high blood pressure
D.
low sugar level in blood
Ans:
low sugar level in blood
Explanation :
Hypoglycemia is an abnormally diminished content of glucose in the blood. The term literally means "low sugar blood". It can produce a variety of symptoms and effects but the principal problems arise from an inadequate supply of glucose to the brain, resulting in impairment of function.
[7] The primary source of carbohydrates are -
A.
Marine animals
B.
Plants
C.
Coal-tar
D.
Crude oil
Ans:
Plants
Explanation :
Plants are the primary sources of carbohydrates. They produce carbohydrates by photosynthesis which is the source of energy for nearly all life on earth, either directly, through primary production, or indirectly, as the ultimate source of the energy in their food.
[8] Which of the following processes does not increase the amount of carbon dioxide in air?
A.
Breathing
B.
Photosynthesis
C.
Burning of petrol
D.
Aerobic decay of vegetation
Ans:
Photosynthesis
Explanation :
Plants reduce the CO2, because they use it with photosynthesis. They use it to give oxygen and carbohydrates as the final product. It is for this reason that plantation of trees has been stressed by environmentalists.
[9] The vitamin that is most readily manufactured in our bodies is -
A.
vitamin A
B.
vitamin B
C.
vitamin C
D.
vitamin D
Ans:
vitamin D
Explanation :
Vitamin D is not really a vitamin, but a precursor for the most potent steroid hormone in the human body. It can be obtained from exposure to the sun's ultraviolet (UV) radiation, especially during the early morning hours.
[10] Aspartame is the name of a product used by diabetic patients as a sweetening agent. It belongs to the class of —
A.
Carbohydrates
B.
Peptides
C.
Polyhydric alcohols
D.
Alkaloids
Ans:
Peptides
Explanation :
Aspartame is an artificial, non-saccharide sweetener used as a sugar substitute in some foods and beverages. It is a methyl ester of the aspartic acid/phenylalanine dipeptide. Under strongly acidic or alkaline conditions, aspartame may generate methanol by hydrolysis. Under more severe conditions, the peptide bonds are also hydrolyzed, resulting in the free amino acids.
[11] Which one of the following four secretions, is different from the remaining three in regard to its mode of transport from the source gland to the site of action?
A.
Saliva
B.
Sweat
C.
Bile
D.
Epinephrine
Ans:
Bile
Explanation :
Saliva: secreted by the salivary glands; Sweat: achieved by the water-rich secretion of the eccrine glands; Epinephrine: also known as adrenaline is a hormone and a neurotransmitter; and Bile: a bitter- tasting, dark green to yellowish brown fluid, produced by the liver that aids the process of digestion of lipids in the small intestine. Bile is the odd one among all four as it is secreted by liver, while others are secreted by glands.
[12] Which one of the following organs excretes water, fat and various catabolic wastes?
A.
Kidney
B.
Skin
C.
Spleen
D.
Salivary glands
Ans:
Kidney
Explanation :
The kidneys are essential in the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acid-base balance, and regulation of blood pressure (via maintaining salt and water balance). They serve the body as a natural filter of the blood, and remove wastes which are diverted to the urinary bladder.
[13] The animal that do not develop hypertension in spite of heavy intake of salt is:
A.
Sheep
B.
Buffalo
C.
Tiger
D.
Camel
Ans:
Camel
Explanation :
The daily salt intake of camels is eight times that of a typical cow or sheep. Yet, surprisingly, they do not develop high blood pressure. Similarly, their blood sugar levels are twice those of other cud-chewing animals: still they do not develop diabetes.
[14] Activity of an enzyme can be modulated by change of -
A.
pH
B.
Light
C.
Humidity
D.
Rainfall
Ans:
pH
Explanation :
Changes in pH which can accompany metabolic process such as respiration (aerobic glycolysis for example) can alter the conformation of an enzyme and hence enzyme activity. The initial changes are covalent (change in protonation state of the protein) which can lead to an alteration in the delicate balance of forces that affect protein structure
[15] Proteins are digested by -
A.
Proteases
B.
Amylases
C.
Lipases
D.
Nucleases
Ans:
Proteases
Explanation :
The digestion of proteins, take place by enzymes called proteases, which begins in the stomach, where pepsin breaks down some proteins into polypeptides. The end products of protein digestion are amino acids which can be absorbed.
[16] Jaundice is a disease which affects -
A.
Heart
B.
Liver
C.
Spleen
D.
Gail bladder
Ans:
Liver
Explanation :
Jaundice is a yellow discoloration of the skin, mucous membranes, and the whites of the eyes caused by increased amounts of bilirubin in the blood. It is often seen in liver disease such as hepatitis or liver cancer.
[17] Cholesterol is absent in -
A.
Groundnut oil
B.
Butter oil
C.
Butter milk
D.
Ice Cream
Ans:
Groundnut oil
Explanation :
100 g of peanut oil (groundnut oil) contains 17.7 g of saturated fat, 48.3 g of monounsaturated fat, 33.4 g of polyunsaturated fat, and 0 mg of cholesterol. It is fast replacing dairy products due to the absence of cholesterol.
[18] The pollutants which move downward with percolating ground water are called -
A.
Leachates
B.
Pollutates
C.
Earthites
D.
Percolates
Ans:
Leachates
Explanation :
Leachate is any liquid that, in passing through matter, extracts solutes, suspended solids or any other component of the material through which it has passed. In older landfills and those with no membrane between the waste and the underlying geology, leachate is free to egress the waste directly into the groundwater. In such cases high concentrations of leachate are often found in nearby springs and flushes.
[19] Lungs are located in the -
A.
abdominal cavity
B.
pericardial cavity
C.
peritoneal cavity
D.
pleural cavity
Ans:
pleural cavity
Explanation :
In human anatomy, the pleural cavity is the potential space between the two pleura (visceral and parietal) of the lungs.
[20] Which of the following diseases is caused by the consumption of nitrate contaminated food and water?
A.
Minimata disease
B.
Osteoporosis
C.
Blue baby syndrome
D.
Asbestosis
Ans:
Blue baby syndrome
Explanation :
Infants under four months of age that drink water or eat food contaminated with high levels of nitrates or nitrites are particularly at risk for methemoglobinemia, or blue baby syndrome. This can occur if water containing high levels of nitrates is used to prepare infant formula, and very rarely if infants eat nitrate-rich spinach which has broken down into nitrite during storage.
[21] In which one of the following is swim bladder absent?
A.
C utdefish
B.
Bony fish
C.
Cartilaginous fish
D.
Silverfish
Ans:
Cartilaginous fish
Explanation :
The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. The cartilaginous fish (e.g. sharks and rays) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
[22] Which one of the following is the smallest endocrine gland in human body?
A.
Adrenal
B.
Thyroid
C.
Pituitary
D.
Pancreas
Ans:
Pituitary
Explanation :
Pituitary gland, called Master Gland, is the smallest endocrine gland. It controls the general growth of the body and stimulates the primary sex hormones, i.e. ovaries and testes.
[23] A seed can germinate in the absence of -
A.
adequate light
B.
supply of oxygen
C.
suitable moisture
D.
suitable temperature
Ans:
adequate light
Explanation :
Light or darkness can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling.
[24] Normally animals can change the place, but which one of the following animals cannot change the place?
A.
Starfish
B.
Sponge
C.
Hydra
D.
Leech
Ans:
Hydra
Explanation :
Hydras are generally sedentary and sessile.
[25] DNA contains -
A.
Pentose sugar
B.
Hexose sugar
C.
Erythrose sugar
D.
Sedoheptulose sugar
Ans:
Pentose sugar
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.
Explanation :
Plants are the primary sources of carbohydrates. They produce carbohydrates by photosynthesis which is the source of energy for nearly all life on earth, either directly, through primary production, or indirectly, as the ultimate source of the energy in their food.
[8] Which of the following processes does not increase the amount of carbon dioxide in air?
A.
Breathing
B.
Photosynthesis
C.
Burning of petrol
D.
Aerobic decay of vegetation
Ans:
Photosynthesis
Explanation :
Plants reduce the CO2, because they use it with photosynthesis. They use it to give oxygen and carbohydrates as the final product. It is for this reason that plantation of trees has been stressed by environmentalists.
[9] The vitamin that is most readily manufactured in our bodies is -
A.
vitamin A
B.
vitamin B
C.
vitamin C
D.
vitamin D
Ans:
vitamin D
Explanation :
Vitamin D is not really a vitamin, but a precursor for the most potent steroid hormone in the human body. It can be obtained from exposure to the sun's ultraviolet (UV) radiation, especially during the early morning hours.
[10] Aspartame is the name of a product used by diabetic patients as a sweetening agent. It belongs to the class of —
A.
Carbohydrates
B.
Peptides
C.
Polyhydric alcohols
D.
Alkaloids
Ans:
Peptides
Explanation :
Aspartame is an artificial, non-saccharide sweetener used as a sugar substitute in some foods and beverages. It is a methyl ester of the aspartic acid/phenylalanine dipeptide. Under strongly acidic or alkaline conditions, aspartame may generate methanol by hydrolysis. Under more severe conditions, the peptide bonds are also hydrolyzed, resulting in the free amino acids.
[11] Which one of the following four secretions, is different from the remaining three in regard to its mode of transport from the source gland to the site of action?
A.
Saliva
B.
Sweat
C.
Bile
D.
Epinephrine
Ans:
Bile
Explanation :
Saliva: secreted by the salivary glands; Sweat: achieved by the water-rich secretion of the eccrine glands; Epinephrine: also known as adrenaline is a hormone and a neurotransmitter; and Bile: a bitter- tasting, dark green to yellowish brown fluid, produced by the liver that aids the process of digestion of lipids in the small intestine. Bile is the odd one among all four as it is secreted by liver, while others are secreted by glands.
[12] Which one of the following organs excretes water, fat and various catabolic wastes?
A.
Kidney
B.
Skin
C.
Spleen
D.
Salivary glands
Ans:
Kidney
Explanation :
The kidneys are essential in the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acid-base balance, and regulation of blood pressure (via maintaining salt and water balance). They serve the body as a natural filter of the blood, and remove wastes which are diverted to the urinary bladder.
[13] The animal that do not develop hypertension in spite of heavy intake of salt is:
A.
Sheep
B.
Buffalo
C.
Tiger
D.
Camel
Ans:
Camel
Explanation :
The daily salt intake of camels is eight times that of a typical cow or sheep. Yet, surprisingly, they do not develop high blood pressure. Similarly, their blood sugar levels are twice those of other cud-chewing animals: still they do not develop diabetes.
[14] Activity of an enzyme can be modulated by change of -
A.
pH
B.
Light
C.
Humidity
D.
Rainfall
Ans:
pH
Explanation :
Changes in pH which can accompany metabolic process such as respiration (aerobic glycolysis for example) can alter the conformation of an enzyme and hence enzyme activity. The initial changes are covalent (change in protonation state of the protein) which can lead to an alteration in the delicate balance of forces that affect protein structure
[15] Proteins are digested by -
A.
Proteases
B.
Amylases
C.
Lipases
D.
Nucleases
Ans:
Proteases
Explanation :
The digestion of proteins, take place by enzymes called proteases, which begins in the stomach, where pepsin breaks down some proteins into polypeptides. The end products of protein digestion are amino acids which can be absorbed.
[16] Jaundice is a disease which affects -
A.
Heart
B.
Liver
C.
Spleen
D.
Gail bladder
Ans:
Liver
Explanation :
Jaundice is a yellow discoloration of the skin, mucous membranes, and the whites of the eyes caused by increased amounts of bilirubin in the blood. It is often seen in liver disease such as hepatitis or liver cancer.
[17] Cholesterol is absent in -
A.
Groundnut oil
B.
Butter oil
C.
Butter milk
D.
Ice Cream
Ans:
Groundnut oil
Explanation :
100 g of peanut oil (groundnut oil) contains 17.7 g of saturated fat, 48.3 g of monounsaturated fat, 33.4 g of polyunsaturated fat, and 0 mg of cholesterol. It is fast replacing dairy products due to the absence of cholesterol.
[18] The pollutants which move downward with percolating ground water are called -
A.
Leachates
B.
Pollutates
C.
Earthites
D.
Percolates
Ans:
Leachates
Explanation :
Leachate is any liquid that, in passing through matter, extracts solutes, suspended solids or any other component of the material through which it has passed. In older landfills and those with no membrane between the waste and the underlying geology, leachate is free to egress the waste directly into the groundwater. In such cases high concentrations of leachate are often found in nearby springs and flushes.
[19] Lungs are located in the -
A.
abdominal cavity
B.
pericardial cavity
C.
peritoneal cavity
D.
pleural cavity
Ans:
pleural cavity
Explanation :
In human anatomy, the pleural cavity is the potential space between the two pleura (visceral and parietal) of the lungs.
[20] Which of the following diseases is caused by the consumption of nitrate contaminated food and water?
A.
Minimata disease
B.
Osteoporosis
C.
Blue baby syndrome
D.
Asbestosis
Ans:
Blue baby syndrome
Explanation :
Infants under four months of age that drink water or eat food contaminated with high levels of nitrates or nitrites are particularly at risk for methemoglobinemia, or blue baby syndrome. This can occur if water containing high levels of nitrates is used to prepare infant formula, and very rarely if infants eat nitrate-rich spinach which has broken down into nitrite during storage.
[21] In which one of the following is swim bladder absent?
A.
C utdefish
B.
Bony fish
C.
Cartilaginous fish
D.
Silverfish
Ans:
Cartilaginous fish
Explanation :
The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. The cartilaginous fish (e.g. sharks and rays) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
[22] Which one of the following is the smallest endocrine gland in human body?
A.
Adrenal
B.
Thyroid
C.
Pituitary
D.
Pancreas
Ans:
Pituitary
Explanation :
Pituitary gland, called Master Gland, is the smallest endocrine gland. It controls the general growth of the body and stimulates the primary sex hormones, i.e. ovaries and testes.
[23] A seed can germinate in the absence of -
A.
adequate light
B.
supply of oxygen
C.
suitable moisture
D.
suitable temperature
Ans:
adequate light
Explanation :
Light or darkness can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling.
[24] Normally animals can change the place, but which one of the following animals cannot change the place?
A.
Starfish
B.
Sponge
C.
Hydra
D.
Leech
Ans:
Hydra
Explanation :
Hydras are generally sedentary and sessile.
[25] DNA contains -
A.
Pentose sugar
B.
Hexose sugar
C.
Erythrose sugar
D.
Sedoheptulose sugar
Ans:
Pentose sugar
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.
Explanation :
Vitamin D is not really a vitamin, but a precursor for the most potent steroid hormone in the human body. It can be obtained from exposure to the sun's ultraviolet (UV) radiation, especially during the early morning hours.
[10] Aspartame is the name of a product used by diabetic patients as a sweetening agent. It belongs to the class of —
A.
Carbohydrates
B.
Peptides
C.
Polyhydric alcohols
D.
Alkaloids
Ans:
Peptides
Explanation :
Aspartame is an artificial, non-saccharide sweetener used as a sugar substitute in some foods and beverages. It is a methyl ester of the aspartic acid/phenylalanine dipeptide. Under strongly acidic or alkaline conditions, aspartame may generate methanol by hydrolysis. Under more severe conditions, the peptide bonds are also hydrolyzed, resulting in the free amino acids.
[11] Which one of the following four secretions, is different from the remaining three in regard to its mode of transport from the source gland to the site of action?
A.
Saliva
B.
Sweat
C.
Bile
D.
Epinephrine
Ans:
Bile
Explanation :
Saliva: secreted by the salivary glands; Sweat: achieved by the water-rich secretion of the eccrine glands; Epinephrine: also known as adrenaline is a hormone and a neurotransmitter; and Bile: a bitter- tasting, dark green to yellowish brown fluid, produced by the liver that aids the process of digestion of lipids in the small intestine. Bile is the odd one among all four as it is secreted by liver, while others are secreted by glands.
[12] Which one of the following organs excretes water, fat and various catabolic wastes?
A.
Kidney
B.
Skin
C.
Spleen
D.
Salivary glands
Ans:
Kidney
Explanation :
The kidneys are essential in the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acid-base balance, and regulation of blood pressure (via maintaining salt and water balance). They serve the body as a natural filter of the blood, and remove wastes which are diverted to the urinary bladder.
[13] The animal that do not develop hypertension in spite of heavy intake of salt is:
A.
Sheep
B.
Buffalo
C.
Tiger
D.
Camel
Ans:
Camel
Explanation :
The daily salt intake of camels is eight times that of a typical cow or sheep. Yet, surprisingly, they do not develop high blood pressure. Similarly, their blood sugar levels are twice those of other cud-chewing animals: still they do not develop diabetes.
[14] Activity of an enzyme can be modulated by change of -
A.
pH
B.
Light
C.
Humidity
D.
Rainfall
Ans:
pH
Explanation :
Changes in pH which can accompany metabolic process such as respiration (aerobic glycolysis for example) can alter the conformation of an enzyme and hence enzyme activity. The initial changes are covalent (change in protonation state of the protein) which can lead to an alteration in the delicate balance of forces that affect protein structure
[15] Proteins are digested by -
A.
Proteases
B.
Amylases
C.
Lipases
D.
Nucleases
Ans:
Proteases
Explanation :
The digestion of proteins, take place by enzymes called proteases, which begins in the stomach, where pepsin breaks down some proteins into polypeptides. The end products of protein digestion are amino acids which can be absorbed.
[16] Jaundice is a disease which affects -
A.
Heart
B.
Liver
C.
Spleen
D.
Gail bladder
Ans:
Liver
Explanation :
Jaundice is a yellow discoloration of the skin, mucous membranes, and the whites of the eyes caused by increased amounts of bilirubin in the blood. It is often seen in liver disease such as hepatitis or liver cancer.
[17] Cholesterol is absent in -
A.
Groundnut oil
B.
Butter oil
C.
Butter milk
D.
Ice Cream
Ans:
Groundnut oil
Explanation :
100 g of peanut oil (groundnut oil) contains 17.7 g of saturated fat, 48.3 g of monounsaturated fat, 33.4 g of polyunsaturated fat, and 0 mg of cholesterol. It is fast replacing dairy products due to the absence of cholesterol.
[18] The pollutants which move downward with percolating ground water are called -
A.
Leachates
B.
Pollutates
C.
Earthites
D.
Percolates
Ans:
Leachates
Explanation :
Leachate is any liquid that, in passing through matter, extracts solutes, suspended solids or any other component of the material through which it has passed. In older landfills and those with no membrane between the waste and the underlying geology, leachate is free to egress the waste directly into the groundwater. In such cases high concentrations of leachate are often found in nearby springs and flushes.
[19] Lungs are located in the -
A.
abdominal cavity
B.
pericardial cavity
C.
peritoneal cavity
D.
pleural cavity
Ans:
pleural cavity
Explanation :
In human anatomy, the pleural cavity is the potential space between the two pleura (visceral and parietal) of the lungs.
[20] Which of the following diseases is caused by the consumption of nitrate contaminated food and water?
A.
Minimata disease
B.
Osteoporosis
C.
Blue baby syndrome
D.
Asbestosis
Ans:
Blue baby syndrome
Explanation :
Infants under four months of age that drink water or eat food contaminated with high levels of nitrates or nitrites are particularly at risk for methemoglobinemia, or blue baby syndrome. This can occur if water containing high levels of nitrates is used to prepare infant formula, and very rarely if infants eat nitrate-rich spinach which has broken down into nitrite during storage.
[21] In which one of the following is swim bladder absent?
A.
C utdefish
B.
Bony fish
C.
Cartilaginous fish
D.
Silverfish
Ans:
Cartilaginous fish
Explanation :
The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. The cartilaginous fish (e.g. sharks and rays) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
[22] Which one of the following is the smallest endocrine gland in human body?
A.
Adrenal
B.
Thyroid
C.
Pituitary
D.
Pancreas
Ans:
Pituitary
Explanation :
Pituitary gland, called Master Gland, is the smallest endocrine gland. It controls the general growth of the body and stimulates the primary sex hormones, i.e. ovaries and testes.
[23] A seed can germinate in the absence of -
A.
adequate light
B.
supply of oxygen
C.
suitable moisture
D.
suitable temperature
Ans:
adequate light
Explanation :
Light or darkness can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling.
[24] Normally animals can change the place, but which one of the following animals cannot change the place?
A.
Starfish
B.
Sponge
C.
Hydra
D.
Leech
Ans:
Hydra
Explanation :
Hydras are generally sedentary and sessile.
[25] DNA contains -
A.
Pentose sugar
B.
Hexose sugar
C.
Erythrose sugar
D.
Sedoheptulose sugar
Ans:
Pentose sugar
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.
Explanation :
Saliva: secreted by the salivary glands; Sweat: achieved by the water-rich secretion of the eccrine glands; Epinephrine: also known as adrenaline is a hormone and a neurotransmitter; and Bile: a bitter- tasting, dark green to yellowish brown fluid, produced by the liver that aids the process of digestion of lipids in the small intestine. Bile is the odd one among all four as it is secreted by liver, while others are secreted by glands.
[12] Which one of the following organs excretes water, fat and various catabolic wastes?
A.
Kidney
B.
Skin
C.
Spleen
D.
Salivary glands
Ans:
Kidney
Explanation :
The kidneys are essential in the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acid-base balance, and regulation of blood pressure (via maintaining salt and water balance). They serve the body as a natural filter of the blood, and remove wastes which are diverted to the urinary bladder.
[13] The animal that do not develop hypertension in spite of heavy intake of salt is:
A.
Sheep
B.
Buffalo
C.
Tiger
D.
Camel
Ans:
Camel
Explanation :
The daily salt intake of camels is eight times that of a typical cow or sheep. Yet, surprisingly, they do not develop high blood pressure. Similarly, their blood sugar levels are twice those of other cud-chewing animals: still they do not develop diabetes.
[14] Activity of an enzyme can be modulated by change of -
A.
pH
B.
Light
C.
Humidity
D.
Rainfall
Ans:
pH
Explanation :
Changes in pH which can accompany metabolic process such as respiration (aerobic glycolysis for example) can alter the conformation of an enzyme and hence enzyme activity. The initial changes are covalent (change in protonation state of the protein) which can lead to an alteration in the delicate balance of forces that affect protein structure
[15] Proteins are digested by -
A.
Proteases
B.
Amylases
C.
Lipases
D.
Nucleases
Ans:
Proteases
Explanation :
The digestion of proteins, take place by enzymes called proteases, which begins in the stomach, where pepsin breaks down some proteins into polypeptides. The end products of protein digestion are amino acids which can be absorbed.
[16] Jaundice is a disease which affects -
A.
Heart
B.
Liver
C.
Spleen
D.
Gail bladder
Ans:
Liver
Explanation :
Jaundice is a yellow discoloration of the skin, mucous membranes, and the whites of the eyes caused by increased amounts of bilirubin in the blood. It is often seen in liver disease such as hepatitis or liver cancer.
[17] Cholesterol is absent in -
A.
Groundnut oil
B.
Butter oil
C.
Butter milk
D.
Ice Cream
Ans:
Groundnut oil
Explanation :
100 g of peanut oil (groundnut oil) contains 17.7 g of saturated fat, 48.3 g of monounsaturated fat, 33.4 g of polyunsaturated fat, and 0 mg of cholesterol. It is fast replacing dairy products due to the absence of cholesterol.
[18] The pollutants which move downward with percolating ground water are called -
A.
Leachates
B.
Pollutates
C.
Earthites
D.
Percolates
Ans:
Leachates
Explanation :
Leachate is any liquid that, in passing through matter, extracts solutes, suspended solids or any other component of the material through which it has passed. In older landfills and those with no membrane between the waste and the underlying geology, leachate is free to egress the waste directly into the groundwater. In such cases high concentrations of leachate are often found in nearby springs and flushes.
[19] Lungs are located in the -
A.
abdominal cavity
B.
pericardial cavity
C.
peritoneal cavity
D.
pleural cavity
Ans:
pleural cavity
Explanation :
In human anatomy, the pleural cavity is the potential space between the two pleura (visceral and parietal) of the lungs.
[20] Which of the following diseases is caused by the consumption of nitrate contaminated food and water?
A.
Minimata disease
B.
Osteoporosis
C.
Blue baby syndrome
D.
Asbestosis
Ans:
Blue baby syndrome
Explanation :
Infants under four months of age that drink water or eat food contaminated with high levels of nitrates or nitrites are particularly at risk for methemoglobinemia, or blue baby syndrome. This can occur if water containing high levels of nitrates is used to prepare infant formula, and very rarely if infants eat nitrate-rich spinach which has broken down into nitrite during storage.
[21] In which one of the following is swim bladder absent?
A.
C utdefish
B.
Bony fish
C.
Cartilaginous fish
D.
Silverfish
Ans:
Cartilaginous fish
Explanation :
The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. The cartilaginous fish (e.g. sharks and rays) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
[22] Which one of the following is the smallest endocrine gland in human body?
A.
Adrenal
B.
Thyroid
C.
Pituitary
D.
Pancreas
Ans:
Pituitary
Explanation :
Pituitary gland, called Master Gland, is the smallest endocrine gland. It controls the general growth of the body and stimulates the primary sex hormones, i.e. ovaries and testes.
[23] A seed can germinate in the absence of -
A.
adequate light
B.
supply of oxygen
C.
suitable moisture
D.
suitable temperature
Ans:
adequate light
Explanation :
Light or darkness can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling.
[24] Normally animals can change the place, but which one of the following animals cannot change the place?
A.
Starfish
B.
Sponge
C.
Hydra
D.
Leech
Ans:
Hydra
Explanation :
Hydras are generally sedentary and sessile.
[25] DNA contains -
A.
Pentose sugar
B.
Hexose sugar
C.
Erythrose sugar
D.
Sedoheptulose sugar
Ans:
Pentose sugar
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.
Explanation :
The daily salt intake of camels is eight times that of a typical cow or sheep. Yet, surprisingly, they do not develop high blood pressure. Similarly, their blood sugar levels are twice those of other cud-chewing animals: still they do not develop diabetes.
[14] Activity of an enzyme can be modulated by change of -
A.
pH
B.
Light
C.
Humidity
D.
Rainfall
Ans:
pH
Explanation :
Changes in pH which can accompany metabolic process such as respiration (aerobic glycolysis for example) can alter the conformation of an enzyme and hence enzyme activity. The initial changes are covalent (change in protonation state of the protein) which can lead to an alteration in the delicate balance of forces that affect protein structure
[15] Proteins are digested by -
A.
Proteases
B.
Amylases
C.
Lipases
D.
Nucleases
Ans:
Proteases
Explanation :
The digestion of proteins, take place by enzymes called proteases, which begins in the stomach, where pepsin breaks down some proteins into polypeptides. The end products of protein digestion are amino acids which can be absorbed.
[16] Jaundice is a disease which affects -
A.
Heart
B.
Liver
C.
Spleen
D.
Gail bladder
Ans:
Liver
Explanation :
Jaundice is a yellow discoloration of the skin, mucous membranes, and the whites of the eyes caused by increased amounts of bilirubin in the blood. It is often seen in liver disease such as hepatitis or liver cancer.
[17] Cholesterol is absent in -
A.
Groundnut oil
B.
Butter oil
C.
Butter milk
D.
Ice Cream
Ans:
Groundnut oil
Explanation :
100 g of peanut oil (groundnut oil) contains 17.7 g of saturated fat, 48.3 g of monounsaturated fat, 33.4 g of polyunsaturated fat, and 0 mg of cholesterol. It is fast replacing dairy products due to the absence of cholesterol.
[18] The pollutants which move downward with percolating ground water are called -
A.
Leachates
B.
Pollutates
C.
Earthites
D.
Percolates
Ans:
Leachates
Explanation :
Leachate is any liquid that, in passing through matter, extracts solutes, suspended solids or any other component of the material through which it has passed. In older landfills and those with no membrane between the waste and the underlying geology, leachate is free to egress the waste directly into the groundwater. In such cases high concentrations of leachate are often found in nearby springs and flushes.
[19] Lungs are located in the -
A.
abdominal cavity
B.
pericardial cavity
C.
peritoneal cavity
D.
pleural cavity
Ans:
pleural cavity
Explanation :
In human anatomy, the pleural cavity is the potential space between the two pleura (visceral and parietal) of the lungs.
[20] Which of the following diseases is caused by the consumption of nitrate contaminated food and water?
A.
Minimata disease
B.
Osteoporosis
C.
Blue baby syndrome
D.
Asbestosis
Ans:
Blue baby syndrome
Explanation :
Infants under four months of age that drink water or eat food contaminated with high levels of nitrates or nitrites are particularly at risk for methemoglobinemia, or blue baby syndrome. This can occur if water containing high levels of nitrates is used to prepare infant formula, and very rarely if infants eat nitrate-rich spinach which has broken down into nitrite during storage.
[21] In which one of the following is swim bladder absent?
A.
C utdefish
B.
Bony fish
C.
Cartilaginous fish
D.
Silverfish
Ans:
Cartilaginous fish
Explanation :
The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. The cartilaginous fish (e.g. sharks and rays) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
[22] Which one of the following is the smallest endocrine gland in human body?
A.
Adrenal
B.
Thyroid
C.
Pituitary
D.
Pancreas
Ans:
Pituitary
Explanation :
Pituitary gland, called Master Gland, is the smallest endocrine gland. It controls the general growth of the body and stimulates the primary sex hormones, i.e. ovaries and testes.
[23] A seed can germinate in the absence of -
A.
adequate light
B.
supply of oxygen
C.
suitable moisture
D.
suitable temperature
Ans:
adequate light
Explanation :
Light or darkness can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling.
[24] Normally animals can change the place, but which one of the following animals cannot change the place?
A.
Starfish
B.
Sponge
C.
Hydra
D.
Leech
Ans:
Hydra
Explanation :
Hydras are generally sedentary and sessile.
[25] DNA contains -
A.
Pentose sugar
B.
Hexose sugar
C.
Erythrose sugar
D.
Sedoheptulose sugar
Ans:
Pentose sugar
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.
Explanation :
The digestion of proteins, take place by enzymes called proteases, which begins in the stomach, where pepsin breaks down some proteins into polypeptides. The end products of protein digestion are amino acids which can be absorbed.
[16] Jaundice is a disease which affects -
A.
Heart
B.
Liver
C.
Spleen
D.
Gail bladder
Ans:
Liver
Explanation :
Jaundice is a yellow discoloration of the skin, mucous membranes, and the whites of the eyes caused by increased amounts of bilirubin in the blood. It is often seen in liver disease such as hepatitis or liver cancer.
[17] Cholesterol is absent in -
A.
Groundnut oil
B.
Butter oil
C.
Butter milk
D.
Ice Cream
Ans:
Groundnut oil
Explanation :
100 g of peanut oil (groundnut oil) contains 17.7 g of saturated fat, 48.3 g of monounsaturated fat, 33.4 g of polyunsaturated fat, and 0 mg of cholesterol. It is fast replacing dairy products due to the absence of cholesterol.
[18] The pollutants which move downward with percolating ground water are called -
A.
Leachates
B.
Pollutates
C.
Earthites
D.
Percolates
Ans:
Leachates
Explanation :
Leachate is any liquid that, in passing through matter, extracts solutes, suspended solids or any other component of the material through which it has passed. In older landfills and those with no membrane between the waste and the underlying geology, leachate is free to egress the waste directly into the groundwater. In such cases high concentrations of leachate are often found in nearby springs and flushes.
[19] Lungs are located in the -
A.
abdominal cavity
B.
pericardial cavity
C.
peritoneal cavity
D.
pleural cavity
Ans:
pleural cavity
Explanation :
In human anatomy, the pleural cavity is the potential space between the two pleura (visceral and parietal) of the lungs.
[20] Which of the following diseases is caused by the consumption of nitrate contaminated food and water?
A.
Minimata disease
B.
Osteoporosis
C.
Blue baby syndrome
D.
Asbestosis
Ans:
Blue baby syndrome
Explanation :
Infants under four months of age that drink water or eat food contaminated with high levels of nitrates or nitrites are particularly at risk for methemoglobinemia, or blue baby syndrome. This can occur if water containing high levels of nitrates is used to prepare infant formula, and very rarely if infants eat nitrate-rich spinach which has broken down into nitrite during storage.
[21] In which one of the following is swim bladder absent?
A.
C utdefish
B.
Bony fish
C.
Cartilaginous fish
D.
Silverfish
Ans:
Cartilaginous fish
Explanation :
The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. The cartilaginous fish (e.g. sharks and rays) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
[22] Which one of the following is the smallest endocrine gland in human body?
A.
Adrenal
B.
Thyroid
C.
Pituitary
D.
Pancreas
Ans:
Pituitary
Explanation :
Pituitary gland, called Master Gland, is the smallest endocrine gland. It controls the general growth of the body and stimulates the primary sex hormones, i.e. ovaries and testes.
[23] A seed can germinate in the absence of -
A.
adequate light
B.
supply of oxygen
C.
suitable moisture
D.
suitable temperature
Ans:
adequate light
Explanation :
Light or darkness can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling.
[24] Normally animals can change the place, but which one of the following animals cannot change the place?
A.
Starfish
B.
Sponge
C.
Hydra
D.
Leech
Ans:
Hydra
Explanation :
Hydras are generally sedentary and sessile.
[25] DNA contains -
A.
Pentose sugar
B.
Hexose sugar
C.
Erythrose sugar
D.
Sedoheptulose sugar
Ans:
Pentose sugar
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.
Explanation :
100 g of peanut oil (groundnut oil) contains 17.7 g of saturated fat, 48.3 g of monounsaturated fat, 33.4 g of polyunsaturated fat, and 0 mg of cholesterol. It is fast replacing dairy products due to the absence of cholesterol.
[18] The pollutants which move downward with percolating ground water are called -
A.
Leachates
B.
Pollutates
C.
Earthites
D.
Percolates
Ans:
Leachates
Explanation :
Leachate is any liquid that, in passing through matter, extracts solutes, suspended solids or any other component of the material through which it has passed. In older landfills and those with no membrane between the waste and the underlying geology, leachate is free to egress the waste directly into the groundwater. In such cases high concentrations of leachate are often found in nearby springs and flushes.
[19] Lungs are located in the -
A.
abdominal cavity
B.
pericardial cavity
C.
peritoneal cavity
D.
pleural cavity
Ans:
pleural cavity
Explanation :
In human anatomy, the pleural cavity is the potential space between the two pleura (visceral and parietal) of the lungs.
[20] Which of the following diseases is caused by the consumption of nitrate contaminated food and water?
A.
Minimata disease
B.
Osteoporosis
C.
Blue baby syndrome
D.
Asbestosis
Ans:
Blue baby syndrome
Explanation :
Infants under four months of age that drink water or eat food contaminated with high levels of nitrates or nitrites are particularly at risk for methemoglobinemia, or blue baby syndrome. This can occur if water containing high levels of nitrates is used to prepare infant formula, and very rarely if infants eat nitrate-rich spinach which has broken down into nitrite during storage.
[21] In which one of the following is swim bladder absent?
A.
C utdefish
B.
Bony fish
C.
Cartilaginous fish
D.
Silverfish
Ans:
Cartilaginous fish
Explanation :
The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. The cartilaginous fish (e.g. sharks and rays) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
[22] Which one of the following is the smallest endocrine gland in human body?
A.
Adrenal
B.
Thyroid
C.
Pituitary
D.
Pancreas
Ans:
Pituitary
Explanation :
Pituitary gland, called Master Gland, is the smallest endocrine gland. It controls the general growth of the body and stimulates the primary sex hormones, i.e. ovaries and testes.
[23] A seed can germinate in the absence of -
A.
adequate light
B.
supply of oxygen
C.
suitable moisture
D.
suitable temperature
Ans:
adequate light
Explanation :
Light or darkness can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling.
[24] Normally animals can change the place, but which one of the following animals cannot change the place?
A.
Starfish
B.
Sponge
C.
Hydra
D.
Leech
Ans:
Hydra
Explanation :
Hydras are generally sedentary and sessile.
[25] DNA contains -
A.
Pentose sugar
B.
Hexose sugar
C.
Erythrose sugar
D.
Sedoheptulose sugar
Ans:
Pentose sugar
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.
Explanation :
In human anatomy, the pleural cavity is the potential space between the two pleura (visceral and parietal) of the lungs.
[20] Which of the following diseases is caused by the consumption of nitrate contaminated food and water?
A.
Minimata disease
B.
Osteoporosis
C.
Blue baby syndrome
D.
Asbestosis
Ans:
Blue baby syndrome
Explanation :
Infants under four months of age that drink water or eat food contaminated with high levels of nitrates or nitrites are particularly at risk for methemoglobinemia, or blue baby syndrome. This can occur if water containing high levels of nitrates is used to prepare infant formula, and very rarely if infants eat nitrate-rich spinach which has broken down into nitrite during storage.
[21] In which one of the following is swim bladder absent?
A.
C utdefish
B.
Bony fish
C.
Cartilaginous fish
D.
Silverfish
Ans:
Cartilaginous fish
Explanation :
The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. The cartilaginous fish (e.g. sharks and rays) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
[22] Which one of the following is the smallest endocrine gland in human body?
A.
Adrenal
B.
Thyroid
C.
Pituitary
D.
Pancreas
Ans:
Pituitary
Explanation :
Pituitary gland, called Master Gland, is the smallest endocrine gland. It controls the general growth of the body and stimulates the primary sex hormones, i.e. ovaries and testes.
[23] A seed can germinate in the absence of -
A.
adequate light
B.
supply of oxygen
C.
suitable moisture
D.
suitable temperature
Ans:
adequate light
Explanation :
Light or darkness can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling.
[24] Normally animals can change the place, but which one of the following animals cannot change the place?
A.
Starfish
B.
Sponge
C.
Hydra
D.
Leech
Ans:
Hydra
Explanation :
Hydras are generally sedentary and sessile.
[25] DNA contains -
A.
Pentose sugar
B.
Hexose sugar
C.
Erythrose sugar
D.
Sedoheptulose sugar
Ans:
Pentose sugar
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.
Explanation :
The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. The cartilaginous fish (e.g. sharks and rays) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
[22] Which one of the following is the smallest endocrine gland in human body?
A.
Adrenal
B.
Thyroid
C.
Pituitary
D.
Pancreas
Ans:
Pituitary
Explanation :
Pituitary gland, called Master Gland, is the smallest endocrine gland. It controls the general growth of the body and stimulates the primary sex hormones, i.e. ovaries and testes.
[23] A seed can germinate in the absence of -
A.
adequate light
B.
supply of oxygen
C.
suitable moisture
D.
suitable temperature
Ans:
adequate light
Explanation :
Light or darkness can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling.
[24] Normally animals can change the place, but which one of the following animals cannot change the place?
A.
Starfish
B.
Sponge
C.
Hydra
D.
Leech
Ans:
Hydra
Explanation :
Hydras are generally sedentary and sessile.
[25] DNA contains -
A.
Pentose sugar
B.
Hexose sugar
C.
Erythrose sugar
D.
Sedoheptulose sugar
Ans:
Pentose sugar
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.
Explanation :
Light or darkness can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling.
[24] Normally animals can change the place, but which one of the following animals cannot change the place?
A.
Starfish
B.
Sponge
C.
Hydra
D.
Leech
Ans:
Hydra
Explanation :
Hydras are generally sedentary and sessile.
[25] DNA contains -
A.
Pentose sugar
B.
Hexose sugar
C.
Erythrose sugar
D.
Sedoheptulose sugar
Ans:
Pentose sugar
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.
Explanation :
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2' carbon of the ribose and its absence on the 2' carbon of the deoxyribose.