BIOLOGY -PAGE 5
1. Which one of the following scientist's name is correctly matched with the theory put forth by him?
(1) Mendel - Theory of Pangenesis
(2) Weismann - Theory of continuity of Germplasm
(3) Pasteur - Inheritance of acquired characters
(4) de Vries - Natural selection
Ans: 2
2. Which one of the following is incorrect about the characteristics of protobionts (coacervates and micropheres) as envisaged in the abiogenic origin of life?
(1) They could maintain an internal environment
(2) They were able to reproduce
(3) They could separate combinations of molecules from the surroundings
(4) They were partially isolated from the surroundings
Ans: 2
3.Darwin's Finches are an excellent example of
(1) Connecting links
(2) Adaptive radiation
(3) Seasonal migration
(4) Brood parasitism
Ans: 2
4. Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?
(1) Wings of honey-bee and wings of crow - Homologous organs
(2) Thorn of Bougainvillea and tendrils of Cucurbita - Analogous organs
(3) Nictitating membrane and blind spot in human eye - Vestigial organs
(4) Nephridia of earthworm and malpighian tubules of cockroach - Excretory organs
Ans: 4
5. The fruit is chambered, developed from inferior ovary and has seeds with succulent testa in
(1) Cucumber
(2) Pomegranate
(3) Orange
(4) Guava
Ans: 2
6. The C4 plants are phoptosynthetically more efficient than C3 plants because
(1) They have more chloroplasts
(2) The CO2 compensation point is more
(3) CO2 generated during photorespiration is trapped and recycled through PEP carboxylase
(4) The CO2 efflux is not prevented
Ans: 1
7. The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because
(1) There is a change in the permeability of the inner mitochondiral membrane toward adenosine diphosphate (ADP)
(2) High energy bonds are formed in mitochondrial proteins
(3) ADP is pumped out of the matrix into the intermembrane space
(4) A proton gradient forms across the inner membrane
Ans: 4
8. Dry indehiscent single-seeded fruit formed bicarpellary syncarpous inferior ovary is
(1) Cremocarp
(2) Caryopsis
(3) Cypsela
(4) Berry
Ans: 3
9. The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of
(1) Transpiration pull
(2) Lignified thick walls
(3) Cohesion and adhesion
(4) Weak gravitational pull
Ans: 3
10. Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in
(1) Floral parts
(2) Vessels and tracheid differentiation
(3) Leaf abscission
(4) Annual plants
Ans: 3
11. Vascular tissues in flowering plants develop from
(1) Dermatogen
(2) Phellogen
(3) Plerome
(4) Periblem
Ans: 3
12. In leaves of C4 plants malic acid synthesis during CO2 fixation occurs in
(1) Guard cells
(2) Epidermal cells
(3) Mesophyll cells
(4) Bundle sheath
Ans: 3
13. Importance of day length in flowering of plants was first shown in
(1) Petunia
(2) Lemna
(3) Tobacco
(4) Cotton
Ans: 3
14. Endosperm is consumed by developing embryo in the seed of
(1) Maize
(2) Coconut
(3) Castor
(4) Pea
Ans: 4
15. Nitrogen fixation in root nodules of Alnus is brought about by
(1) Azorhizobium
(2) Bradyhizobium
(3) Clostridium
(4) Frankia
Ans: 4
16. The energy releasing process in which the substrate is oxidised without an external electron acceptor is called
(1) Glycolysis
(2) Fermentation
(3) Photorespiration
(4) Aerobic respiration
Ans: 2
17. Replum is present in the ovary of flower of
(1) Pea (2) Lemon (3) Mustard (4) Sunflower
Ans: 3
18. The fleshy receptacle of syconus of fig encloses a number of
(1) Mericarps (2) Achenes (3) Samaras (4) Berries
Ans: 2
19. Electrons from excited chlorophyll molecule of photosystem II are accepted first by
(1) Ferredoxin (2) Cytochrome - b (3) Cytochrome - f (4) Quinone
Ans: 4
20. Which type of white blood cells are concerned with the release of histamine and the natural anticoagulant heparin?
(1) Monocytes (2) Neutrophils (3) Basophils (4) Eosinophils
Ans: 3
21. Which one of the following is the true description about an animal concerned?
(1) Cockroach - 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)
(2) Earthworm - The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine
(3) Frog - Body divisible into three regions - head, neck and trunk
(4) Rat - Left kidney is slightly higher in position than the right one
Ans: 1
22. What is vital capacity of our lungs?
(1) Total lungs capacity minus residual volume
(2) Inspiratory reserve volume plus tidal volume
(3) Total lungs capacity minus expiratory reserve volume
(4) Inspiratory reserve volume plus expiratory reserve volume
Ans: 1
23. Which one of the following items gives its correct total number?
(1) Cervical vertebrae in humans - 8
(2) Floating ribs in humans - 4
(3) Amino acids found in proteins - 16
(4) Types of diabetes - 3
Ans: 2
(1) Mendel - Theory of Pangenesis
(2) Weismann - Theory of continuity of Germplasm
(3) Pasteur - Inheritance of acquired characters
(4) de Vries - Natural selection
Ans: 2
2. Which one of the following is incorrect about the characteristics of protobionts (coacervates and micropheres) as envisaged in the abiogenic origin of life?
(1) They could maintain an internal environment
(2) They were able to reproduce
(3) They could separate combinations of molecules from the surroundings
(4) They were partially isolated from the surroundings
Ans: 2
3.Darwin's Finches are an excellent example of
(1) Connecting links
(2) Adaptive radiation
(3) Seasonal migration
(4) Brood parasitism
Ans: 2
4. Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?
(1) Wings of honey-bee and wings of crow - Homologous organs
(2) Thorn of Bougainvillea and tendrils of Cucurbita - Analogous organs
(3) Nictitating membrane and blind spot in human eye - Vestigial organs
(4) Nephridia of earthworm and malpighian tubules of cockroach - Excretory organs
Ans: 4
5. The fruit is chambered, developed from inferior ovary and has seeds with succulent testa in
(1) Cucumber
(2) Pomegranate
(3) Orange
(4) Guava
Ans: 2
6. The C4 plants are phoptosynthetically more efficient than C3 plants because
(1) They have more chloroplasts
(2) The CO2 compensation point is more
(3) CO2 generated during photorespiration is trapped and recycled through PEP carboxylase
(4) The CO2 efflux is not prevented
Ans: 1
7. The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because
(1) There is a change in the permeability of the inner mitochondiral membrane toward adenosine diphosphate (ADP)
(2) High energy bonds are formed in mitochondrial proteins
(3) ADP is pumped out of the matrix into the intermembrane space
(4) A proton gradient forms across the inner membrane
Ans: 4
8. Dry indehiscent single-seeded fruit formed bicarpellary syncarpous inferior ovary is
(1) Cremocarp
(2) Caryopsis
(3) Cypsela
(4) Berry
Ans: 3
9. The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of
(1) Transpiration pull
(2) Lignified thick walls
(3) Cohesion and adhesion
(4) Weak gravitational pull
Ans: 3
10. Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in
(1) Floral parts
(2) Vessels and tracheid differentiation
(3) Leaf abscission
(4) Annual plants
Ans: 3
11. Vascular tissues in flowering plants develop from
(1) Dermatogen
(2) Phellogen
(3) Plerome
(4) Periblem
Ans: 3
12. In leaves of C4 plants malic acid synthesis during CO2 fixation occurs in
(1) Guard cells
(2) Epidermal cells
(3) Mesophyll cells
(4) Bundle sheath
Ans: 3
13. Importance of day length in flowering of plants was first shown in
(1) Petunia
(2) Lemna
(3) Tobacco
(4) Cotton
Ans: 3
14. Endosperm is consumed by developing embryo in the seed of
(1) Maize
(2) Coconut
(3) Castor
(4) Pea
Ans: 4
15. Nitrogen fixation in root nodules of Alnus is brought about by
(1) Azorhizobium
(2) Bradyhizobium
(3) Clostridium
(4) Frankia
Ans: 4
16. The energy releasing process in which the substrate is oxidised without an external electron acceptor is called
(1) Glycolysis
(2) Fermentation
(3) Photorespiration
(4) Aerobic respiration
Ans: 2
17. Replum is present in the ovary of flower of
(1) Pea (2) Lemon (3) Mustard (4) Sunflower
Ans: 3
18. The fleshy receptacle of syconus of fig encloses a number of
(1) Mericarps (2) Achenes (3) Samaras (4) Berries
Ans: 2
19. Electrons from excited chlorophyll molecule of photosystem II are accepted first by
(1) Ferredoxin (2) Cytochrome - b (3) Cytochrome - f (4) Quinone
Ans: 4
20. Which type of white blood cells are concerned with the release of histamine and the natural anticoagulant heparin?
(1) Monocytes (2) Neutrophils (3) Basophils (4) Eosinophils
Ans: 3
21. Which one of the following is the true description about an animal concerned?
(1) Cockroach - 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)
(2) Earthworm - The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine
(3) Frog - Body divisible into three regions - head, neck and trunk
(4) Rat - Left kidney is slightly higher in position than the right one
Ans: 1
22. What is vital capacity of our lungs?
(1) Total lungs capacity minus residual volume
(2) Inspiratory reserve volume plus tidal volume
(3) Total lungs capacity minus expiratory reserve volume
(4) Inspiratory reserve volume plus expiratory reserve volume
Ans: 1
23. Which one of the following items gives its correct total number?
(1) Cervical vertebrae in humans - 8
(2) Floating ribs in humans - 4
(3) Amino acids found in proteins - 16
(4) Types of diabetes - 3
Ans: 2
24. What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?
(1) Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin
(2) Gastric juice will be deficient in chymosin
(3) Gastric juice will be deficient in pepsinogen
(4) In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin.
Ans: 4
25. During the propagation of a nerve impulse, the action potential results from the movement of
(1) Na+ ions from extracellular fluid to intracellular fluid
(2) Ka+ ions from extracellular fluid to intracellular fluid
(3) Na+ ions from intracellular fluid to extracellular fluid
(4) Ka+ ions from intracellular fluid to extracellular fluid
Ans: 1
26. The blood calcium level is lowered by the deficiency of
(1) Calcitonin (2) Parathormone (3) Thyroxine (4) Both Calcitonin and Parathormone
Ans: 2
27. The most active phagocytic white blood cells are
(1) Neutrophils and monocytes (2) Neutrophils and eosinophils (3) Lymphocytes and macrophages (4) Eosinophils and lymphocytes
Ans: 1
28. Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to
(1) Setae (2) Coelomic fluid
(3) Blood (4) Gut peristalsis
Ans: 2
29. In humans, blood passes from the post caval to the diastolic right atrium of heart due to
(1) Pressure difference between the post caval and atrium (2) Pushing open of the venous valves
(3) Suction pull (4) Stimulation of the sino auricular node
Ans: 1
30. In humans, at the end of the first meiotic division, the male germ cells differentiate into the
(1) Spermatozonia (2) Primary spermatocytes (3) Secondary spermatocytes (4) Spermatids
Ans: 3
31. Which one of the following is resistant to enzyme action?
(1) Leaf cuticle (2) Cork (3) Wood fibre (4) Pollen exine
Ans: 4
32. The length of different internodes in a culm of sugarcane is variable because of
(1) Intercalary meristem (2) Shoot apical meristem (3) Position of axillary buds (4) Size of leaf lamina at the node below each internode
Ans: 1
33. Which one of the following pairs of plant structures has haploid number of chromosomes?
(1) Egg nucleus and secondary nucleus (2) Megaspore mother cell and antipodal cells
(3) Egg cell and antipodal cells (4) Nucellus and antipodal cells
Ans: 3
34. What does the filiform apparatus do at the entrance into ovule?
(1) It guides pollen tube from a synergid to egg (2) It helps in the entry of pollen tube into a synergid
(3) It prevents entry of more than one pollen tube into the embryosac (4) It brings about opening of the pollen tube
Ans: 2
35. Unisexuality of flowers prevents
(1) Autogamy and geitonogamy (2) Autogamy, but not geitonogamy
(3) Both geitonogamy and xenogamy (4) Geitonogamy, but not xenogamy
Ans: 2
36. Which extraembryonic membrane in humans prevents desiccation of the embryo inside the utrerus?
(1) Amnion (2) Chorion (3) Allantois (4) Yolk sac
Ans: 1
37. Which one of the following statements is incorrect about menstruation?
(1) The beginning of the cycle of menstruation is called menarche (2) During normal menstruation about 40 ml blood is lost
(3) The menstrual fluid can easily clot (4) At menopause in the female, there is especially abrupt increase in gonadotropic hormones
Ans: 3
38. The haemoglobin of a human foetus
(1) Has a higher affinity for oxygen than that of an adult (2) Has a lower affinity for oxygen than that of the adult
(3) Its affinity for oxygen is the same as that of an adult (4) Has only 2 protein subunits instead of 4
Ans: 1
39. Consider the statements given below regarding contraception and answer as directed thereafter
(a) Medical Termination of Pregnancy (MTP) during first trimester is generally safe
(b) Generally chances of conception are nil until mother breast-feeds the infant upto two years
(c) Intrauterine devices like copper-T are effective contraceptives
(d) Contraception pills may be taken upto one week after coitus to prevent conception
Which two of the above statements are correct?
(1) a, b (2) b, c (3) c, d (4) a, c
Ans: 4
40. In human adult females oxytocin
(1) Causes strong uterine contractions during parturition (2) Is secreted by anterior pituitary
(3) Stimulates growth of mammary glands (4) Stimulates pituitary to secrete vasopressin
Ans: 1
41. Which one of the following is the correct percentage of the two (out of the total of 4) green house gases that contribute to the total global warming?
(1) Methane 20%, N2O 18% (2) CFCs14%, Methane 20%
(3) CO2 40%, CFSs 30% (4) N2O 6%, CO2 86%
Ans: 2
42. Quercus species are the dominant component in
(1) Tropical rain forests (2) Temperate deciduous forests (3) Alpine forests (4) Scrub forests
Ans: 2
43. About 70% of total global carbon is found in
(1) Forests (2) Grasslands (3) Agroecosystems (4) Oceans
Ans: 4
(1) Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin
(2) Gastric juice will be deficient in chymosin
(3) Gastric juice will be deficient in pepsinogen
(4) In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin.
Ans: 4
25. During the propagation of a nerve impulse, the action potential results from the movement of
(1) Na+ ions from extracellular fluid to intracellular fluid
(2) Ka+ ions from extracellular fluid to intracellular fluid
(3) Na+ ions from intracellular fluid to extracellular fluid
(4) Ka+ ions from intracellular fluid to extracellular fluid
Ans: 1
26. The blood calcium level is lowered by the deficiency of
(1) Calcitonin (2) Parathormone (3) Thyroxine (4) Both Calcitonin and Parathormone
Ans: 2
27. The most active phagocytic white blood cells are
(1) Neutrophils and monocytes (2) Neutrophils and eosinophils (3) Lymphocytes and macrophages (4) Eosinophils and lymphocytes
Ans: 1
28. Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to
(1) Setae (2) Coelomic fluid
(3) Blood (4) Gut peristalsis
Ans: 2
29. In humans, blood passes from the post caval to the diastolic right atrium of heart due to
(1) Pressure difference between the post caval and atrium (2) Pushing open of the venous valves
(3) Suction pull (4) Stimulation of the sino auricular node
Ans: 1
30. In humans, at the end of the first meiotic division, the male germ cells differentiate into the
(1) Spermatozonia (2) Primary spermatocytes (3) Secondary spermatocytes (4) Spermatids
Ans: 3
31. Which one of the following is resistant to enzyme action?
(1) Leaf cuticle (2) Cork (3) Wood fibre (4) Pollen exine
Ans: 4
32. The length of different internodes in a culm of sugarcane is variable because of
(1) Intercalary meristem (2) Shoot apical meristem (3) Position of axillary buds (4) Size of leaf lamina at the node below each internode
Ans: 1
33. Which one of the following pairs of plant structures has haploid number of chromosomes?
(1) Egg nucleus and secondary nucleus (2) Megaspore mother cell and antipodal cells
(3) Egg cell and antipodal cells (4) Nucellus and antipodal cells
Ans: 3
34. What does the filiform apparatus do at the entrance into ovule?
(1) It guides pollen tube from a synergid to egg (2) It helps in the entry of pollen tube into a synergid
(3) It prevents entry of more than one pollen tube into the embryosac (4) It brings about opening of the pollen tube
Ans: 2
35. Unisexuality of flowers prevents
(1) Autogamy and geitonogamy (2) Autogamy, but not geitonogamy
(3) Both geitonogamy and xenogamy (4) Geitonogamy, but not xenogamy
Ans: 2
36. Which extraembryonic membrane in humans prevents desiccation of the embryo inside the utrerus?
(1) Amnion (2) Chorion (3) Allantois (4) Yolk sac
Ans: 1
37. Which one of the following statements is incorrect about menstruation?
(1) The beginning of the cycle of menstruation is called menarche (2) During normal menstruation about 40 ml blood is lost
(3) The menstrual fluid can easily clot (4) At menopause in the female, there is especially abrupt increase in gonadotropic hormones
Ans: 3
38. The haemoglobin of a human foetus
(1) Has a higher affinity for oxygen than that of an adult (2) Has a lower affinity for oxygen than that of the adult
(3) Its affinity for oxygen is the same as that of an adult (4) Has only 2 protein subunits instead of 4
Ans: 1
39. Consider the statements given below regarding contraception and answer as directed thereafter
(a) Medical Termination of Pregnancy (MTP) during first trimester is generally safe
(b) Generally chances of conception are nil until mother breast-feeds the infant upto two years
(c) Intrauterine devices like copper-T are effective contraceptives
(d) Contraception pills may be taken upto one week after coitus to prevent conception
Which two of the above statements are correct?
(1) a, b (2) b, c (3) c, d (4) a, c
Ans: 4
40. In human adult females oxytocin
(1) Causes strong uterine contractions during parturition (2) Is secreted by anterior pituitary
(3) Stimulates growth of mammary glands (4) Stimulates pituitary to secrete vasopressin
Ans: 1
41. Which one of the following is the correct percentage of the two (out of the total of 4) green house gases that contribute to the total global warming?
(1) Methane 20%, N2O 18% (2) CFCs14%, Methane 20%
(3) CO2 40%, CFSs 30% (4) N2O 6%, CO2 86%
Ans: 2
42. Quercus species are the dominant component in
(1) Tropical rain forests (2) Temperate deciduous forests (3) Alpine forests (4) Scrub forests
Ans: 2
43. About 70% of total global carbon is found in
(1) Forests (2) Grasslands (3) Agroecosystems (4) Oceans
Ans: 4
44. Which one of the following is not observed in biodiversity hotspots?
(1) Species richness (2) Endemism (3) Accelerated species loss (4) Lesser inter-specific competition
Ans: 4
45. World summit on Sustainable Development (2002) was held in
(1) South Africa (2) Brazil (3) Sweden (4) Argentina
Ans: 1
46. The slow rate of decomposition of fallen logs in nature is due to their
(1) Low cellulose content (2) Low moisture content (3) Poor nitrogen content (4) Anaerobic environment around them
Ans: 2
47. Consider the following statements concerning food chains
(a) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation
(b) Removal of most of the carnivores resulted in an increased population of deers
(c) The length of food chains is generally limited to 3-4 trophic levels due to energy loss
(d) The length of food chains may vary from 2 to 8 trophic levels. Which two of the above statements are correct?
(1) a, b (2) b, c (3) c, d (4) a, d
Ans: 2
48. According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?
(1) 5.2 - 2.5 (2) 2.5 or less (3) 1.5 or less (4) 1.0 or less
Ans: 2
(1) Species richness (2) Endemism (3) Accelerated species loss (4) Lesser inter-specific competition
Ans: 4
45. World summit on Sustainable Development (2002) was held in
(1) South Africa (2) Brazil (3) Sweden (4) Argentina
Ans: 1
46. The slow rate of decomposition of fallen logs in nature is due to their
(1) Low cellulose content (2) Low moisture content (3) Poor nitrogen content (4) Anaerobic environment around them
Ans: 2
47. Consider the following statements concerning food chains
(a) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation
(b) Removal of most of the carnivores resulted in an increased population of deers
(c) The length of food chains is generally limited to 3-4 trophic levels due to energy loss
(d) The length of food chains may vary from 2 to 8 trophic levels. Which two of the above statements are correct?
(1) a, b (2) b, c (3) c, d (4) a, d
Ans: 2
48. According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?
(1) 5.2 - 2.5 (2) 2.5 or less (3) 1.5 or less (4) 1.0 or less
Ans: 2
49. A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this
(a) Lots of urea and phosphate fertilizer were used in the crops in the vicinity
(b) The area was sprayed with DDT by an aircraft
(c) The lake water turned green and stinky
(d) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis
Which two of the above were the main causes of fish mortality in the lake?
(1) a, b
(2) b, c
(3) c, d
(4) a, c
Ans: 4
50. Consider the following four statements (a - d) about certain desert animals such as kangaroo rat.
(a) They have dark colour and high rate of reproduction and excrete solid urine
(b) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs
(c) They feed on dry seeds and do not require drinking water
(d) They excrete very concentrated urine and do not use water to regulate body temperature
Which two of the above statements for such animals are true?
(1) a and b (2) c and d (3) b and c (4) c and a
Ans: 2
51. A transgeneic food crop which may help in solving the problem of night blindness in developing countries is
(1) Golden rice (2) Flavr Savr tomatoes (3) Starlink maize (4) Bt Soybean
Ans: 1
52. Bacterial leaf blight of rice is caused by a species of
(1) Erwinia (2) Xanthomonas (3) Pseudomonas (4) Alternaria
Ans: 2
53. Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
(1) Black rust of wheat (2) Bacterial leaf blight of rice (3) Downy mildew of grapes (4) Loose smut of wheat
Ans: 3
54. Which one of the following is being tried in India as a biofuel substitute for fossil fuels?
(1) Aegilops (2) Jatropha (3) Azadirachta (4) Musa
Ans: 2
55. Trichoderma harzianum has proved a useful microorganism for
(1) Biological control of soi-borne plant pathogens (2) Bioremediation of contaminated soils
(3) Reclamation of wastelands (4) Gene transfer in higher plants
Ans: 1
56. Gel electrophoresis is used for
(1) Isolation of DNA molecule (2) Cutting of DNA into fragments
(3) Separation of DNA fragments according to their size (4) Construction of recombinant DNA by joining with cloning vectors
Ans: 3
57. To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?
(1) Physical barriers (2) Cytokine barriers (3) Cellular barriers (4) Physiological barriers
Ans:4
(a) Lots of urea and phosphate fertilizer were used in the crops in the vicinity
(b) The area was sprayed with DDT by an aircraft
(c) The lake water turned green and stinky
(d) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis
Which two of the above were the main causes of fish mortality in the lake?
(1) a, b
(2) b, c
(3) c, d
(4) a, c
Ans: 4
50. Consider the following four statements (a - d) about certain desert animals such as kangaroo rat.
(a) They have dark colour and high rate of reproduction and excrete solid urine
(b) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs
(c) They feed on dry seeds and do not require drinking water
(d) They excrete very concentrated urine and do not use water to regulate body temperature
Which two of the above statements for such animals are true?
(1) a and b (2) c and d (3) b and c (4) c and a
Ans: 2
51. A transgeneic food crop which may help in solving the problem of night blindness in developing countries is
(1) Golden rice (2) Flavr Savr tomatoes (3) Starlink maize (4) Bt Soybean
Ans: 1
52. Bacterial leaf blight of rice is caused by a species of
(1) Erwinia (2) Xanthomonas (3) Pseudomonas (4) Alternaria
Ans: 2
53. Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
(1) Black rust of wheat (2) Bacterial leaf blight of rice (3) Downy mildew of grapes (4) Loose smut of wheat
Ans: 3
54. Which one of the following is being tried in India as a biofuel substitute for fossil fuels?
(1) Aegilops (2) Jatropha (3) Azadirachta (4) Musa
Ans: 2
55. Trichoderma harzianum has proved a useful microorganism for
(1) Biological control of soi-borne plant pathogens (2) Bioremediation of contaminated soils
(3) Reclamation of wastelands (4) Gene transfer in higher plants
Ans: 1
56. Gel electrophoresis is used for
(1) Isolation of DNA molecule (2) Cutting of DNA into fragments
(3) Separation of DNA fragments according to their size (4) Construction of recombinant DNA by joining with cloning vectors
Ans: 3
57. To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?
(1) Physical barriers (2) Cytokine barriers (3) Cellular barriers (4) Physiological barriers
Ans:4
58. Consider the following statements about biomedical technologies
(a) During open heart surgery blood is circulated in the heart-lung machine
(b) Blockage in coronary arteries is removed by angiography
(c) Computerised Axial Tomography (CAT) shows detailed internal structure as seen in a section of body
(d) X-ray provides clear and detailed images or organs like prostate glands and lungs
Which two of the above statements are correct?
(1) a and b (2) b and d (3) c and d
(4) a and c
Ans: 4
59. Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?
(1) UUA, UCA - Leucine (2) GUU, GCU - Alanine (3) UAG, UGA - Stop (4) AUG, ACG - Start / Methionine
Ans: 3
60. Which one of the following is the correct statement regarding the particular psychotropic drug specified?
(1) Barbiturates cause relation and temporary euphoria (2) Hashish causes after thought perceptions and hallucinations
(3) Opium stimulates nervous system and causes hallucinations (4) Morphine leads to delusions and disturbed emotions
Ans: 2
61. Cry 1 endotoxins obtained from Bacillus Thuringiensis are effective against
(1) Boll worms (2) Mosquitoes (3) Flies (4) Nematodes
Ans: 1
62. Modern detergents contain enzyme preparations of
(1) Thermophiles (2) Acidophiles (3) Alkaliphiles (4) Thermoacidophiles
Ans: 2
63. The linking of antibiotic resistance gene with the plasmid vector became possible with
(1) Exonucleases (2) DNA ligase
(3) Endouncleases (4) DNA polymerase
Ans: 2
64. Which one of the following proved effective for biological control of nematodal disease in plants?
(1) Paecilomyces lilacinus (2) Pisolithus tinctorius (3) Pseudomonas cepacia (4) Gliocladium virens
Ans: 3
65. Main objective of production/use of herbicide resistant GM crops is to
(1) Reduce herbicide accumulation in food articles for health safety
(2) Eliminate weeds from the field without the use of manual labour
(3) eliminate weeds from the field without the use of herbicides
(4) Encourage eco-friendly herbicides
Ans: 2
66. Consider the following four measures (a - d) that could be taken to successfully grow chick-pea in an area where bacterial blight disease is common
(a) Spray with Bordeaux mixture
(b) Control of the insect vector of the disease pathogen
(c) Use of only disease-free seeds
(d) Use of varieties resistant to the disease
Which two of the above measures can control the disease?
(1) (a) and (d) (2) (b) and (c) (3) (a) and (b) (4) (c) and (d)
Ans: 4
67. Human insulin is being commercially produced from a transgenic species of
(1) Saccharomyces (2) Escherichia (3) Mycobacterium (4) Rhizobium
Ans: 2
68. Cornea transplant in humans is almost never rejected. This is because
(1) It is a non-living layer (2) Its cells are least penetrable by bacteria
(3) It has no blood supply (4) It is composed of enucleated cells
Ans: 3
69. Which of the following pairs of organs includes only the endocrine glands?
(1) Adrenal and Ovary (2) Parathyroid and Adrenal (3) Pancreas and Parathyroid (4) Thymus and Testes
Ans: 2
70. What is antisense technology?
(1) RNA polymerase producing DNA
(2) A cell displaying a foreign antigen used for synthesis of antigens
(3) Production of somaclonal variants in tissue cultures
(4) When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene
Ans: 4
(a) During open heart surgery blood is circulated in the heart-lung machine
(b) Blockage in coronary arteries is removed by angiography
(c) Computerised Axial Tomography (CAT) shows detailed internal structure as seen in a section of body
(d) X-ray provides clear and detailed images or organs like prostate glands and lungs
Which two of the above statements are correct?
(1) a and b (2) b and d (3) c and d
(4) a and c
Ans: 4
59. Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?
(1) UUA, UCA - Leucine (2) GUU, GCU - Alanine (3) UAG, UGA - Stop (4) AUG, ACG - Start / Methionine
Ans: 3
60. Which one of the following is the correct statement regarding the particular psychotropic drug specified?
(1) Barbiturates cause relation and temporary euphoria (2) Hashish causes after thought perceptions and hallucinations
(3) Opium stimulates nervous system and causes hallucinations (4) Morphine leads to delusions and disturbed emotions
Ans: 2
61. Cry 1 endotoxins obtained from Bacillus Thuringiensis are effective against
(1) Boll worms (2) Mosquitoes (3) Flies (4) Nematodes
Ans: 1
62. Modern detergents contain enzyme preparations of
(1) Thermophiles (2) Acidophiles (3) Alkaliphiles (4) Thermoacidophiles
Ans: 2
63. The linking of antibiotic resistance gene with the plasmid vector became possible with
(1) Exonucleases (2) DNA ligase
(3) Endouncleases (4) DNA polymerase
Ans: 2
64. Which one of the following proved effective for biological control of nematodal disease in plants?
(1) Paecilomyces lilacinus (2) Pisolithus tinctorius (3) Pseudomonas cepacia (4) Gliocladium virens
Ans: 3
65. Main objective of production/use of herbicide resistant GM crops is to
(1) Reduce herbicide accumulation in food articles for health safety
(2) Eliminate weeds from the field without the use of manual labour
(3) eliminate weeds from the field without the use of herbicides
(4) Encourage eco-friendly herbicides
Ans: 2
66. Consider the following four measures (a - d) that could be taken to successfully grow chick-pea in an area where bacterial blight disease is common
(a) Spray with Bordeaux mixture
(b) Control of the insect vector of the disease pathogen
(c) Use of only disease-free seeds
(d) Use of varieties resistant to the disease
Which two of the above measures can control the disease?
(1) (a) and (d) (2) (b) and (c) (3) (a) and (b) (4) (c) and (d)
Ans: 4
67. Human insulin is being commercially produced from a transgenic species of
(1) Saccharomyces (2) Escherichia (3) Mycobacterium (4) Rhizobium
Ans: 2
68. Cornea transplant in humans is almost never rejected. This is because
(1) It is a non-living layer (2) Its cells are least penetrable by bacteria
(3) It has no blood supply (4) It is composed of enucleated cells
Ans: 3
69. Which of the following pairs of organs includes only the endocrine glands?
(1) Adrenal and Ovary (2) Parathyroid and Adrenal (3) Pancreas and Parathyroid (4) Thymus and Testes
Ans: 2
70. What is antisense technology?
(1) RNA polymerase producing DNA
(2) A cell displaying a foreign antigen used for synthesis of antigens
(3) Production of somaclonal variants in tissue cultures
(4) When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene
Ans: 4
71:-Identify the wrong statement about ozone gas.
A:-The ozone layer of the atmosphere protects us from harmful UV radiation from the sun
B:-Release of Chloro Fluro Carbons (CFCs) were responsible for the thinning and damage to ozone layer
C:-Inhalation of Ozone is harmful to human beings
D:-Ozone in the atmosphere is found at ground level only
Ans: D
72:-Minamata disease is associated with poisoning due to
A:-Bacteria
B:-Mercury
C:-Sulphur
D:-Argon
Ans: B
73:-"The amount of carbon dioxide released into the atmosphere as a result of the activities of a particular individual, organization or community" is called
A:-Carbon footprint
B:-Ecological footprint
C:-Per capita emission
D:-Carbon balance
Ans: A
74:-Oil spills in water bodies are a man-made hazard, Which of the following is a possible effect of an oil spill in a water body ?
A:-Increase in dissolved oxygen levels
B:-Decrease in dissolved oxygen levels
C:-No effect on dissolved oxygen levels
D:-None of the above
Ans: B
75:-Which is the only Genetically Modified (GM) crop that is being cultivated in India on a commercial scale ?
A:-Bt Cotton
B:-Bt Brinjal
C:-GM Mustard
D:-GM Tomato
Ans: A
76:-The two primary scales used to measure intensity of earthquakes are
A:-Doppler and Richter
B:-Beaufort and Richter
C:-Richter and Mercalli
D:-Doppler and Mercalli
Ans: C
A:-The ozone layer of the atmosphere protects us from harmful UV radiation from the sun
B:-Release of Chloro Fluro Carbons (CFCs) were responsible for the thinning and damage to ozone layer
C:-Inhalation of Ozone is harmful to human beings
D:-Ozone in the atmosphere is found at ground level only
Ans: D
72:-Minamata disease is associated with poisoning due to
A:-Bacteria
B:-Mercury
C:-Sulphur
D:-Argon
Ans: B
73:-"The amount of carbon dioxide released into the atmosphere as a result of the activities of a particular individual, organization or community" is called
A:-Carbon footprint
B:-Ecological footprint
C:-Per capita emission
D:-Carbon balance
Ans: A
74:-Oil spills in water bodies are a man-made hazard, Which of the following is a possible effect of an oil spill in a water body ?
A:-Increase in dissolved oxygen levels
B:-Decrease in dissolved oxygen levels
C:-No effect on dissolved oxygen levels
D:-None of the above
Ans: B
75:-Which is the only Genetically Modified (GM) crop that is being cultivated in India on a commercial scale ?
A:-Bt Cotton
B:-Bt Brinjal
C:-GM Mustard
D:-GM Tomato
Ans: A
76:-The two primary scales used to measure intensity of earthquakes are
A:-Doppler and Richter
B:-Beaufort and Richter
C:-Richter and Mercalli
D:-Doppler and Mercalli
Ans: C
77. Sickle cell anemia is:
1) caused by substitution of valine by glutamic acid in the beta globin chain of haemoglobin
2) caused by a change in a single base pair of DNA
3) characterized by elongated sickle like RBCs with a nucleus
4) an autosomal linked dominant trait
Ans: 2
78. Which of the following plant species you would select for the production of bioethanol ?
1) Zea mays 2) Pongamia 3) Jatropha 4) Brassica
Ans: 3
79. When breast feeding is replaced by less nutritive food low in proteins and calories; the infants below the age of one year are likely to suffer from:
1) Rickets
2) Kwashiorkor
3) Pellagra
4) Marasmus
Ans: 2
80. A young infant may be feeding entirely on mother’s milk which is white in colour but the stools which the infant passes out is quite yellowish. What is this yellow colour due to ?
1) Bile pigments passed through bile juice
2) Undigested milk protein casein
3) Pancreatic juice poured into duodenum
4) Intestinal juice
Ans: 1
81. Which one of the following has maximum genetic diversity in India?
1) Mango 2) Wheat 3) Tea 4) Teak
Ans: 2
82. Oxygenic photosynthesis occurs in:
1) Oscillatoria 2) Rhodospirillum 3) Chlorobium 4) Chromatium
Ans: 1
83. There is no DNA in:
1) Mature RBCs 2) A mature spermatozoan 3) Hair root 4) An enucleated ovum
Ans: 1
84. The epithelial tissue present on the inner surface of bronchioles and fallopian tubes is:
1) Glandular 2) Ciliated 3) Squamous 4) Cuboidal
Ans: 2
85. Tiger is not a resident in which one of the following national park ?
1) Sunderbans 2) Gir 3) Jim Corbett 4) Ranthambhor
Ans: 2
86. Which one of the following statements is true regarding digestion and absorption of food in humans ?
1) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na+.
2) Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries.
3) About 60% of starch is hydrolysed by salivary amylase in our mouth.
4) Oxyntic cells in our stomach secrete the proenzyme pepsinogen.
Ans: 1
87. Synapsis occurs between:
1) mRNA and ribosomes 2) spindle fibres and centromere 3) two homologous chromosomes 4) a male and a female gamete
Ans: 3
88. Polyethylene glycol method is used for:
1) Biodiesel production 2) Seedless fruit production 3) Energy production from sewage 4) Gene transfer without a vector
Ans: 4
89. What is not true for genetic code?
1) It is nearly universal 2) It is degenerate 3) It is unambiguous 4) A codon in mRNA is read in a non-contiguous fashion
Ans: 4
90. Which one of the following plants is monoecious?
1) Pinus 2) Cycas 3) Papaya 4) Marchantia
Ans: 1
91. Cyclic photophosphorylation results in the formation of
1) ATP and NADPH 2) ATP, NADPH and O2 3) ATP 4) NADPH
Ans: 3
92. The letter T in T-lymphocyte refers to:
1) Thalamus 2) Tonsil 3) Thymus 4) Thyroid
Ans: 3
93. Foetal ejection reflex in human female is induced by:
1) release of oxytocin from pituitary
2) fully developed foetus and placenta
3) differentiation of mammary glands
4) pressure exerted by amniotic fluid
Ans: 2
94. Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by
1) Absence of secondary phloem 2) Presence of cortex 3) Position of protoxylem 4) Absence of secondary xylem
Ans: 3
95. Plasmodesmata are :
1) Locomotary structures
2) Membranes connecting the nucleus with plasmalemma
3) Connections between adjacent cells
4) Lignified cemented layers between cells
Ans: 3
96. Removal of introns and joining the exons in a defined order in a transcription unit is called:
1) Tailing 2) Transformation 3) Capping 4) Splicing
Ans: 4
97. Phylogenetic system of classification is based on :
1) Morphological features 2) Chemical constituents 3) Floral characters 4) Evolutionary relationships
Ans: 4
98. Which part of human brain is concerned with the regulation of body temperature?
1) Cerebellum 2) Cerebrum 3) Hypothalamus 4) Medulla Oblongata
Ans: 3
99. Semiconservative replication of DNA was first demonstrated in:
1) Escherichia coli 2) Streptococcus pneumoniae 3) Salmonella typhimurium 4) Drosophila melanogaster
Ans: 1
100. Which one of the following pairs of animals comprises 'jawless fishes'?
1) Mackerals and Rohu 2) Lampreys and hag fishes 3) Guppies and hag fishes 4) Lampreys and eels
Ans: 2
1) caused by substitution of valine by glutamic acid in the beta globin chain of haemoglobin
2) caused by a change in a single base pair of DNA
3) characterized by elongated sickle like RBCs with a nucleus
4) an autosomal linked dominant trait
Ans: 2
78. Which of the following plant species you would select for the production of bioethanol ?
1) Zea mays 2) Pongamia 3) Jatropha 4) Brassica
Ans: 3
79. When breast feeding is replaced by less nutritive food low in proteins and calories; the infants below the age of one year are likely to suffer from:
1) Rickets
2) Kwashiorkor
3) Pellagra
4) Marasmus
Ans: 2
80. A young infant may be feeding entirely on mother’s milk which is white in colour but the stools which the infant passes out is quite yellowish. What is this yellow colour due to ?
1) Bile pigments passed through bile juice
2) Undigested milk protein casein
3) Pancreatic juice poured into duodenum
4) Intestinal juice
Ans: 1
81. Which one of the following has maximum genetic diversity in India?
1) Mango 2) Wheat 3) Tea 4) Teak
Ans: 2
82. Oxygenic photosynthesis occurs in:
1) Oscillatoria 2) Rhodospirillum 3) Chlorobium 4) Chromatium
Ans: 1
83. There is no DNA in:
1) Mature RBCs 2) A mature spermatozoan 3) Hair root 4) An enucleated ovum
Ans: 1
84. The epithelial tissue present on the inner surface of bronchioles and fallopian tubes is:
1) Glandular 2) Ciliated 3) Squamous 4) Cuboidal
Ans: 2
85. Tiger is not a resident in which one of the following national park ?
1) Sunderbans 2) Gir 3) Jim Corbett 4) Ranthambhor
Ans: 2
86. Which one of the following statements is true regarding digestion and absorption of food in humans ?
1) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na+.
2) Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries.
3) About 60% of starch is hydrolysed by salivary amylase in our mouth.
4) Oxyntic cells in our stomach secrete the proenzyme pepsinogen.
Ans: 1
87. Synapsis occurs between:
1) mRNA and ribosomes 2) spindle fibres and centromere 3) two homologous chromosomes 4) a male and a female gamete
Ans: 3
88. Polyethylene glycol method is used for:
1) Biodiesel production 2) Seedless fruit production 3) Energy production from sewage 4) Gene transfer without a vector
Ans: 4
89. What is not true for genetic code?
1) It is nearly universal 2) It is degenerate 3) It is unambiguous 4) A codon in mRNA is read in a non-contiguous fashion
Ans: 4
90. Which one of the following plants is monoecious?
1) Pinus 2) Cycas 3) Papaya 4) Marchantia
Ans: 1
91. Cyclic photophosphorylation results in the formation of
1) ATP and NADPH 2) ATP, NADPH and O2 3) ATP 4) NADPH
Ans: 3
92. The letter T in T-lymphocyte refers to:
1) Thalamus 2) Tonsil 3) Thymus 4) Thyroid
Ans: 3
93. Foetal ejection reflex in human female is induced by:
1) release of oxytocin from pituitary
2) fully developed foetus and placenta
3) differentiation of mammary glands
4) pressure exerted by amniotic fluid
Ans: 2
94. Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by
1) Absence of secondary phloem 2) Presence of cortex 3) Position of protoxylem 4) Absence of secondary xylem
Ans: 3
95. Plasmodesmata are :
1) Locomotary structures
2) Membranes connecting the nucleus with plasmalemma
3) Connections between adjacent cells
4) Lignified cemented layers between cells
Ans: 3
96. Removal of introns and joining the exons in a defined order in a transcription unit is called:
1) Tailing 2) Transformation 3) Capping 4) Splicing
Ans: 4
97. Phylogenetic system of classification is based on :
1) Morphological features 2) Chemical constituents 3) Floral characters 4) Evolutionary relationships
Ans: 4
98. Which part of human brain is concerned with the regulation of body temperature?
1) Cerebellum 2) Cerebrum 3) Hypothalamus 4) Medulla Oblongata
Ans: 3
99. Semiconservative replication of DNA was first demonstrated in:
1) Escherichia coli 2) Streptococcus pneumoniae 3) Salmonella typhimurium 4) Drosophila melanogaster
Ans: 1
100. Which one of the following pairs of animals comprises 'jawless fishes'?
1) Mackerals and Rohu 2) Lampreys and hag fishes 3) Guppies and hag fishes 4) Lampreys and eels
Ans: 2