BIOLOGY -PAGE 4
1. ICBN stands for
(a) International Code of Botanical Nomenclature (b) International congress of Biological Names
(c) Indian Code of Botanical Nomenclature (d) Indian Congress of Biological Names.
Ans: A
2. Which pair of the following belongs to Basidiomycetes
(a) puffballs and Claviceps (b) peziza and stink borns (c) Morchella and mushrooms (d) birds nest fungi and puffballs.
Ans: D
3. Biological organisation starts with
(a) cellular level (b) organismic level (c) atomic level (d) submicroscopic molecular level
Ans: D
4. Identify the odd combination of the habitat and the particular animal concerned.
(a) sunderbans - Bengal Tiger (b) periyar - Elephant (c) Rann of kutch - wild Ass (d) Dachigam National park - Snow Leopard.
Ans: D
5. If you suspect major deficiency of antibodies in a person to which of the following would you look for confirmatory evidence?
(a) serum globulins (b) fibrinogen in the plasma (c) haemocytes (d) serum albumins
Ans: A
6. A common test to find the genotype of a hybrid is by
(a) crossing of one F2 progeny with female parent
(b) studying the sexual behavior of F1 progenies
(c) crossing of one F1 progeny with male parent
(d) crossing of one F2 progeny with male parent.
Ans: C
7. The okazaki fragments in DNA chain growth
(a) polymerize in the 3’ - to - 5’ direction and forms replication fork
(b) prove semi-conservative natuire of DNA replication
(c) polymerize in teh 5’ - to - 3’ direction and explain 3’ - to - 5’ DNA replication
(d) result in transcription.
Ans: C
8. Which one of the following statement is correct?
(a) there is no evidence of the existence of gills during embryogensis of mammals
(b) all plant and animal cells are totipotent
(c) ontogeny repeats phylogeny
(d) stem cells are specialize cells.
Ans: C
9. In which one of the following the BOD (Biochemical Oxygen Demand ) of sewage (s), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order ?
(a) SE < PE < S < DE
(b) PE < S < SE < DE
(c) S < DE < PE < SE
(d) SE < S < PE < DE.
Ans: B
10. The concept of chemical evolution is based on
(a) interaction of water, air and clay under intense heat
(b) effect of solar radiation on chemicals
(c) possible orgin of life by combination of chemicals under suitable environmental conditions
(d) crystallization of chemicals.
Ans: C
11. Which one of the following is surrounded by a callose wall?
(a) male gamete (b) egg (c) pollen grain (d) microspore mother cell
Ans: D
12. Probiotics are
(a) cancer inducing microbes
(b) new kind of food allergens
(c) live microbial food supplement
(d) safe antibiotics
Ans: C
13. One of endangered species of Indian medicinal plants is that of
(a) ocimum (b) garlic (c) nepenthes (d) podophyllum
Ans: D
14. What is true about Nereis, scorpion, cockroach and silver fish ?
(a) they all posses dorsal heart (b) none of them is aquatic
(c) they all belong to the same phylum (d) they all have jointed paired appendages
Ans: A
15. The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for
(a) interaction with the environment and progressive evolution
(b) reproduction
(c) growth and movement
(d) responsiveness to touch.
Ans: B
16. A person who is one along hunger strike and is surviving only on water, will have.
(a) less amino acids in his urine
(b) more glucose in his blood
(c) less urea in his urine
(d) more sodium in his urine .
Ans: C
17. The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated?
(a) super-coiling in nucleosomes
(b) DNase digestion
(c) through elemination of repititive DNA
(d) deletion of non-essential genes.
Ans: A
18. A sequential expression of a set of human genes
(a) messenger RNA (b) DNA sequence
(c) ribosome (d) transfer RNA.
Ans: B
19. In a coal fired power plant electrostatic precipitators are installed to control emission of
(a) NO× (b) SPM (c) CO (d) SO2
Ans: B
20. Select the wrong statement fom the following.
(a) Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by teh thylakoid membrane
(b) Both chloroplasts and mitochondria contain DNA
(c) The chloroplasts are generally much large than mitochondria
(d) Both chloroplasts and mitochondria contain an inner and an outer membrane.
Ans: A
21. Geometric representation of age structure is a characteristic of
(a) population (b) landscape (c) ecosystem (d) biotic community.
Ans: A
22. During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure, what is it’s DNA-binding sequence?
(a) AATT (b) CACC (c) TATA (d) TTAA
Ans: A
23. A plant requires magnesium for
(a) protein synthesis (b) chlorophyll synthesis
(c) cell wall development (d) holding cells together.
Ans: B
24. In the prothallus of a vascular cryptogam, the antherozoids and eggs mature a different times. As a result
(a) there is high degree of sterility
(b) one can conclude that the plant is apomictic
(c) self-fertilization is prevented
(d) there is no change in success rate of fertilization
Ans: C
25. Ergot of rye is caused by a species of
(a) uncimula (b) ustilago (c) claviceps (d) phytophthora.
Ans: C
26. The finches of Galapagos islands provide an evidence in favour of
(a) evolution due to mutation (b) retrogressive evolution
(c) biogeographical evolution (d) special creation .
Ans: C
27. Which one of the following is a slime mould?
(a) physarum (b) Thiobacillus (c) Anabaena (d) Rhizopus.
Ans: A
28. The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show?
(a) the food plants mature and die at the end of the rainy season
(b) its population growth curve is of J-type
(c) the population of its predators increases enormously
(d) S-shaped or sigmoid growth of this insect.
Ans: B
29. Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing micro-organism
(a) crotalaria juncea
(b) cycas revolute
(c) cicer arietinum
(d) casuarina equisetifolia
Ans: D
30. Which one of the following is being utilized as a source of biodiesel in the Indian countryside?
(a) beetroot (b) sugarcane (c) pongamia (d) euphorbia
Ans: C
31. For a critical study of secondary growth in plants. which one of the following pairs is suitable?
(a) teak and pine (b) deodar and fern (c) wheat and maiden hair fern (d) sugarcane and sunflower.
Ans: A
32. Which one of the following is a fat-soluble vitamin and its related deficiency disease?
(a) Retinol - Xerophtahalmia (b) Cobalamine - Beri-beri (c) Calciferol - Pellagra (d) A scorbic acid - Scurvy.
Ans: A
33. Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will.
(a) no movement of water
(b) equilibrium between the two
(c) movement of water from cell A to B.
(d) movement of water from cell B to A.
Ans: C
34. In which one of the following preparations are your likely to come across cell junctions most frequently ?
(a) thrombocytes (b) tendon (c) hyaline cartilage (d) ciliated epithelium.
Ans: D
35. If you are asked to classify the various algae into distnct groups, which of the following characters you should choose?
(a) nature of stored food materials in the cell (b) structural organization of thallus
(c) chemical comppsition of the cell wall (d) types of pigments present in the cell.
Ans: D
36. About 98 percent of the mass of every living organism is composed of just six element including carbon, hydrogen, nitrogen, oxygen and
(a) sulphur and magnesium (b) magnesium and sodium (c) calcium and phosphorus (d) phosphorus and sulphur.
Ans: C
37. Which one of the following statements is correct?
(a) Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants.
(b) Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and for plant nutrition in soil
(c) At present it is not possible to grow maize without chemical fertilizers
(d) Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies.
Ans: D
38. In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are
(a) n = 21 and x = 21
(b) n = 21 and x = 14
(c) n = 21 and x = 7
(d) n = 7 and x = 21.
Ans: C
39. Passage cells are thin walled cells found in
(a) phloem elements that serve as entry points for substance for transport to other plant parts
(b) testa of seeds to enable emergence of growing embryonic axis during seed germination
(c) central region of style through which the pollen tube grows towards the ovary
(d) endodermis of roots facilitating rapid transport of water from cortex to pericycle.
Ans: D
40. What is common between parrot, platypus and kangaroo?
(a) toothless jaws (b) functional post-end tail (c) ovoparity (d) homoiothermy
Ans: D
41. The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is
(a) iron-sulphur protein (b) ferredoxin (c) quinone (d) cytochrome
Ans: C
42. Differentiation of organs and tissues in a developing organism, is associated with
(a) differential expession of genes (b) lethal mutations (c) deletion of genes (d) developmental mutations.
Ans: A
43. Which one of the following statements about mycoplasma is wrong ?
(a) They are pleomorphic (b) They are sensitive to penicillin (c) They cause diseases in plants (d) They are also called PPLO.
Ans: B
44. Which one of the following pairs is mismatched?
(a) Apis indica - honey (b) kenia lacca - lac (c) Bombyx mori - silk (d) Pila globosa - pearl
Ans: D
45. A person is having problems with calcium and phosphorus metabolism in his body. Which one of following glands may not be functioning properly ?
(a) parotid (b) pancreas (c) thyroid (d) parathyroid
Ans: D
46. A genetically engineered micro-organism use successfully in bioremediation of oil spills is a species of
(a) Trichoderma (b) Xanthomonas (c) Bacillus (d) Pseudomonas.
Ans: D
47. In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of
(a) bundle sheath (b) phloem (c) epidermis (d) mesophyll
Ans: D
48. Flagellated male gametes are present in all the three of which one of the following sets ?
(a) Zygnema, Saprolegnia and Hydrilla (b) fucus, Marsilea and Calotropis
(c) Riccia, Dryopteris and Cycas (d) Anthoceros, Funaria and Spirogyra
Ans: C
(a) International Code of Botanical Nomenclature (b) International congress of Biological Names
(c) Indian Code of Botanical Nomenclature (d) Indian Congress of Biological Names.
Ans: A
2. Which pair of the following belongs to Basidiomycetes
(a) puffballs and Claviceps (b) peziza and stink borns (c) Morchella and mushrooms (d) birds nest fungi and puffballs.
Ans: D
3. Biological organisation starts with
(a) cellular level (b) organismic level (c) atomic level (d) submicroscopic molecular level
Ans: D
4. Identify the odd combination of the habitat and the particular animal concerned.
(a) sunderbans - Bengal Tiger (b) periyar - Elephant (c) Rann of kutch - wild Ass (d) Dachigam National park - Snow Leopard.
Ans: D
5. If you suspect major deficiency of antibodies in a person to which of the following would you look for confirmatory evidence?
(a) serum globulins (b) fibrinogen in the plasma (c) haemocytes (d) serum albumins
Ans: A
6. A common test to find the genotype of a hybrid is by
(a) crossing of one F2 progeny with female parent
(b) studying the sexual behavior of F1 progenies
(c) crossing of one F1 progeny with male parent
(d) crossing of one F2 progeny with male parent.
Ans: C
7. The okazaki fragments in DNA chain growth
(a) polymerize in the 3’ - to - 5’ direction and forms replication fork
(b) prove semi-conservative natuire of DNA replication
(c) polymerize in teh 5’ - to - 3’ direction and explain 3’ - to - 5’ DNA replication
(d) result in transcription.
Ans: C
8. Which one of the following statement is correct?
(a) there is no evidence of the existence of gills during embryogensis of mammals
(b) all plant and animal cells are totipotent
(c) ontogeny repeats phylogeny
(d) stem cells are specialize cells.
Ans: C
9. In which one of the following the BOD (Biochemical Oxygen Demand ) of sewage (s), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order ?
(a) SE < PE < S < DE
(b) PE < S < SE < DE
(c) S < DE < PE < SE
(d) SE < S < PE < DE.
Ans: B
10. The concept of chemical evolution is based on
(a) interaction of water, air and clay under intense heat
(b) effect of solar radiation on chemicals
(c) possible orgin of life by combination of chemicals under suitable environmental conditions
(d) crystallization of chemicals.
Ans: C
11. Which one of the following is surrounded by a callose wall?
(a) male gamete (b) egg (c) pollen grain (d) microspore mother cell
Ans: D
12. Probiotics are
(a) cancer inducing microbes
(b) new kind of food allergens
(c) live microbial food supplement
(d) safe antibiotics
Ans: C
13. One of endangered species of Indian medicinal plants is that of
(a) ocimum (b) garlic (c) nepenthes (d) podophyllum
Ans: D
14. What is true about Nereis, scorpion, cockroach and silver fish ?
(a) they all posses dorsal heart (b) none of them is aquatic
(c) they all belong to the same phylum (d) they all have jointed paired appendages
Ans: A
15. The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for
(a) interaction with the environment and progressive evolution
(b) reproduction
(c) growth and movement
(d) responsiveness to touch.
Ans: B
16. A person who is one along hunger strike and is surviving only on water, will have.
(a) less amino acids in his urine
(b) more glucose in his blood
(c) less urea in his urine
(d) more sodium in his urine .
Ans: C
17. The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated?
(a) super-coiling in nucleosomes
(b) DNase digestion
(c) through elemination of repititive DNA
(d) deletion of non-essential genes.
Ans: A
18. A sequential expression of a set of human genes
(a) messenger RNA (b) DNA sequence
(c) ribosome (d) transfer RNA.
Ans: B
19. In a coal fired power plant electrostatic precipitators are installed to control emission of
(a) NO× (b) SPM (c) CO (d) SO2
Ans: B
20. Select the wrong statement fom the following.
(a) Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by teh thylakoid membrane
(b) Both chloroplasts and mitochondria contain DNA
(c) The chloroplasts are generally much large than mitochondria
(d) Both chloroplasts and mitochondria contain an inner and an outer membrane.
Ans: A
21. Geometric representation of age structure is a characteristic of
(a) population (b) landscape (c) ecosystem (d) biotic community.
Ans: A
22. During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure, what is it’s DNA-binding sequence?
(a) AATT (b) CACC (c) TATA (d) TTAA
Ans: A
23. A plant requires magnesium for
(a) protein synthesis (b) chlorophyll synthesis
(c) cell wall development (d) holding cells together.
Ans: B
24. In the prothallus of a vascular cryptogam, the antherozoids and eggs mature a different times. As a result
(a) there is high degree of sterility
(b) one can conclude that the plant is apomictic
(c) self-fertilization is prevented
(d) there is no change in success rate of fertilization
Ans: C
25. Ergot of rye is caused by a species of
(a) uncimula (b) ustilago (c) claviceps (d) phytophthora.
Ans: C
26. The finches of Galapagos islands provide an evidence in favour of
(a) evolution due to mutation (b) retrogressive evolution
(c) biogeographical evolution (d) special creation .
Ans: C
27. Which one of the following is a slime mould?
(a) physarum (b) Thiobacillus (c) Anabaena (d) Rhizopus.
Ans: A
28. The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show?
(a) the food plants mature and die at the end of the rainy season
(b) its population growth curve is of J-type
(c) the population of its predators increases enormously
(d) S-shaped or sigmoid growth of this insect.
Ans: B
29. Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing micro-organism
(a) crotalaria juncea
(b) cycas revolute
(c) cicer arietinum
(d) casuarina equisetifolia
Ans: D
30. Which one of the following is being utilized as a source of biodiesel in the Indian countryside?
(a) beetroot (b) sugarcane (c) pongamia (d) euphorbia
Ans: C
31. For a critical study of secondary growth in plants. which one of the following pairs is suitable?
(a) teak and pine (b) deodar and fern (c) wheat and maiden hair fern (d) sugarcane and sunflower.
Ans: A
32. Which one of the following is a fat-soluble vitamin and its related deficiency disease?
(a) Retinol - Xerophtahalmia (b) Cobalamine - Beri-beri (c) Calciferol - Pellagra (d) A scorbic acid - Scurvy.
Ans: A
33. Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will.
(a) no movement of water
(b) equilibrium between the two
(c) movement of water from cell A to B.
(d) movement of water from cell B to A.
Ans: C
34. In which one of the following preparations are your likely to come across cell junctions most frequently ?
(a) thrombocytes (b) tendon (c) hyaline cartilage (d) ciliated epithelium.
Ans: D
35. If you are asked to classify the various algae into distnct groups, which of the following characters you should choose?
(a) nature of stored food materials in the cell (b) structural organization of thallus
(c) chemical comppsition of the cell wall (d) types of pigments present in the cell.
Ans: D
36. About 98 percent of the mass of every living organism is composed of just six element including carbon, hydrogen, nitrogen, oxygen and
(a) sulphur and magnesium (b) magnesium and sodium (c) calcium and phosphorus (d) phosphorus and sulphur.
Ans: C
37. Which one of the following statements is correct?
(a) Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants.
(b) Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and for plant nutrition in soil
(c) At present it is not possible to grow maize without chemical fertilizers
(d) Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies.
Ans: D
38. In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are
(a) n = 21 and x = 21
(b) n = 21 and x = 14
(c) n = 21 and x = 7
(d) n = 7 and x = 21.
Ans: C
39. Passage cells are thin walled cells found in
(a) phloem elements that serve as entry points for substance for transport to other plant parts
(b) testa of seeds to enable emergence of growing embryonic axis during seed germination
(c) central region of style through which the pollen tube grows towards the ovary
(d) endodermis of roots facilitating rapid transport of water from cortex to pericycle.
Ans: D
40. What is common between parrot, platypus and kangaroo?
(a) toothless jaws (b) functional post-end tail (c) ovoparity (d) homoiothermy
Ans: D
41. The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is
(a) iron-sulphur protein (b) ferredoxin (c) quinone (d) cytochrome
Ans: C
42. Differentiation of organs and tissues in a developing organism, is associated with
(a) differential expession of genes (b) lethal mutations (c) deletion of genes (d) developmental mutations.
Ans: A
43. Which one of the following statements about mycoplasma is wrong ?
(a) They are pleomorphic (b) They are sensitive to penicillin (c) They cause diseases in plants (d) They are also called PPLO.
Ans: B
44. Which one of the following pairs is mismatched?
(a) Apis indica - honey (b) kenia lacca - lac (c) Bombyx mori - silk (d) Pila globosa - pearl
Ans: D
45. A person is having problems with calcium and phosphorus metabolism in his body. Which one of following glands may not be functioning properly ?
(a) parotid (b) pancreas (c) thyroid (d) parathyroid
Ans: D
46. A genetically engineered micro-organism use successfully in bioremediation of oil spills is a species of
(a) Trichoderma (b) Xanthomonas (c) Bacillus (d) Pseudomonas.
Ans: D
47. In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of
(a) bundle sheath (b) phloem (c) epidermis (d) mesophyll
Ans: D
48. Flagellated male gametes are present in all the three of which one of the following sets ?
(a) Zygnema, Saprolegnia and Hydrilla (b) fucus, Marsilea and Calotropis
(c) Riccia, Dryopteris and Cycas (d) Anthoceros, Funaria and Spirogyra
Ans: C
49. Spore dissemination in some liverworts is aided by
(a) indusium (b) calyptra (c) peristome teeth (d) elaters.
Ans: D
50. Which one of the following elements is not an essential micronutrient for plant growth?
(a) Zn (b) Cu (c) Ca (d) Mn
Ans: C
51. The overall goal of glycolysis, krebs cycle and the electron transport system is the formation of
(a) ATP in one large oxidation reaction (b) sugars (c) nucleic acids (d) ATP in small stepwise units.
Ans: D
52. Adaptive radiation refers to
(a) evolution of different species from a common ancestor
(b) migration of members of a species to different geographical areas
(c) power of adaptation in an individual to a variety of environments
(d) adaptations due to geographical isolation.
Ans: A
53. Which one of the follwoing pairs, is not correctly matched?
(a) Gibberellic acid - Leaf fall
(b) Cytokinin - Cell wall elongation
(c) IAA - Cell wall elongation
(d) Abscissic acid - Stomatal closure.
Ans: A
54. Select the correct statement from the following?
(a) Fitness is the end result of the ability to adapt and gets selected by nature
(b) All mammals except whales and camels have seven cervical vertebrae
(c) Mutations are random and directional
(d) Darwinian variations are small and directionless.
Ans: A
55. Male gametes in angiosperms are formed by the division of
(a) generative cell (b) vegetative cell (c) microspore mother cell (d) microspore.
Ans: A
56. In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in F1 generation ?
(a) 9 : 1 (b) 1 : 3 (c) 3 : 1 (d) 50 :50
Ans: D
57. Which one of the following mammalian cells is not capable of metabolizing glucose to carbon dioxide aerobically?
(a) unstraited muscle cells (b) liver cells (c) red blood cells (d) white blood
Ans: C
58. A human male produces sperms with the genotypes AB, Ab, aB, and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person?
(a) AaBB (b) AABb (c) AABB (d) AaBb.
Ans: D
59. What is common to whale, seal and shark?
(a) thick subcutaneous fat (b) convergent evolution (c) homoiothermy (d) seasonal migration.
Ans: B
60. One of the important consequences of geographical isolation is
(a) preventing speciation (b) speciation through reproductive isolation
(c) random creation of new species (d) no change in the isolated fauna.
Ans: B
61. Lysozyme that is present in perspiration, saliva and tears, destroys
(a) certain types of bacteria (b) all viruses (c) most virus-infected cells (d) certain fungi
Ans: A
62. In the human female, menstruation can be deferred by the administration of
(a) combination of FSH and LH (b) combination of estrogen and progesterone (c) FSH only (d) LH only
Ans: B
63. Which one of the following is not a constituent of cell membrane?
(a) glycolipids (b) proline (c) phospholipids (d) cholesterol.
Ans: B
64. Compared to a bull a bullock is docile because of
(a) higher levels of cortisone (b) lower levels of blood testosterone
(c) lower levels of adrenaline/ noradrenaline in its blood (d) higher levels of thyroxine.
Ans: B
65. During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric change?
(a) first positive, then negative and continue to be positive
(b) first negative, then positive and continue to be positive.
(c) first positive, then negative and again back to positive
(d) first negative, then positive and again back to negative .
Ans: D
66. Which one of the following pairs of organisms are exotic species introduced in India ?
(a) lantana camara, water hyacinth (b) water hyacinth, prosopis cineraria
(c) nile perch, licus religiosa (d) ficus religiosa , lantana camara.
Ans: A
67. In gymnosperms, the pollen chamber represents
(a) a cavity in the ovule in which pollen grains are stored after pollination
(b) an opening in the megagametophyte through which the pollen tube approaches the egg
(c) the microsporangium in which pollen grains develop
(d) a cell in the pollen grain in which the sperms are formed.
Ans: C
68. Molecular basis of organ differentiation dpends on the modulation in transcription by
(a) ribosome (b) transcription factor (c) anticodon (d) RNA polymerase.
Ans: D
69. Which of the follwoing is an example of negative feedback loop in humans?
(a) secretion of tears after falling of sand particles into the eye. (b) salivation of mouth at the sight of delicious food
(c) secretion of sweat glands and constriction of skin blood vessels when it is too hot (d) constriction of skin blood vessels and contraction of skeletal mucles when it is too cold
Ans: D
70. The two polynucleotide chains in DNA are
(a) discontinuous (b) antiparallel (c) semiconservative(d) parallel.
Ans: B
71. Which of the following pairs are correctly matched ? Animals - Morphological features (i) Crocodile - 4-chambered heart (ii) Sea urchin - Parapodia (iii) Obelia - Thecodont (iv) Lemur - Thecodont
(a) (ii), (iii) and (iv)
(b) only (i) and (iv)
(c) only (i) and (ii)
(d) (i), (iii) and (iv)
Ans: D
72. Which one of the following pairs of structures distinguishes a nerve cell from other types of cells?
(a) vacuoles and fibres (b) flagellum and modulloary sheath
(c) nucleus and mitochondria (d) perikaryon and dendrites.
Ans: D
73. In maize, hybrid vigour is exploited by
(a) crossing of two inbred parental lines (b) harvesting seeds from the most productive plants
(c) inducing mutations (d) bombarding the seeds with DNA.
Ans: A
74. Which one of the following is a viral disease of poultry ?
(a) coryza (b) new castle disease (c) pasteurellosis (d) salmonellosis.
Ans: B
75. The wavelength of light absorbed by Pr form of phytochrome is
(a) 680 nm (b) 720 nm (c) 620 nm (d) 640 nm
Ans: A
76. Which one of the following is not a bioindicator of water pollution?
(a) blood-worms (b) stone flies (c) sewage fungus (d) sludge-worms.
Ans: B
77. Feeling the tremors of an earthquake a scared resident of seventh floor of a multistoryed building starts climbing down the stairs rapidly. Which hormone initiated this action ?
(a) adrenaline (b) glucagon (b) gastrin (d) thyroxine
Ans: A
78. “Foolish seedling’’ disease of rice led to the discovery of
(a) ABA (b) 2, 4-D (c) IAA (d) GA
Ans: D
(a) indusium (b) calyptra (c) peristome teeth (d) elaters.
Ans: D
50. Which one of the following elements is not an essential micronutrient for plant growth?
(a) Zn (b) Cu (c) Ca (d) Mn
Ans: C
51. The overall goal of glycolysis, krebs cycle and the electron transport system is the formation of
(a) ATP in one large oxidation reaction (b) sugars (c) nucleic acids (d) ATP in small stepwise units.
Ans: D
52. Adaptive radiation refers to
(a) evolution of different species from a common ancestor
(b) migration of members of a species to different geographical areas
(c) power of adaptation in an individual to a variety of environments
(d) adaptations due to geographical isolation.
Ans: A
53. Which one of the follwoing pairs, is not correctly matched?
(a) Gibberellic acid - Leaf fall
(b) Cytokinin - Cell wall elongation
(c) IAA - Cell wall elongation
(d) Abscissic acid - Stomatal closure.
Ans: A
54. Select the correct statement from the following?
(a) Fitness is the end result of the ability to adapt and gets selected by nature
(b) All mammals except whales and camels have seven cervical vertebrae
(c) Mutations are random and directional
(d) Darwinian variations are small and directionless.
Ans: A
55. Male gametes in angiosperms are formed by the division of
(a) generative cell (b) vegetative cell (c) microspore mother cell (d) microspore.
Ans: A
56. In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in F1 generation ?
(a) 9 : 1 (b) 1 : 3 (c) 3 : 1 (d) 50 :50
Ans: D
57. Which one of the following mammalian cells is not capable of metabolizing glucose to carbon dioxide aerobically?
(a) unstraited muscle cells (b) liver cells (c) red blood cells (d) white blood
Ans: C
58. A human male produces sperms with the genotypes AB, Ab, aB, and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person?
(a) AaBB (b) AABb (c) AABB (d) AaBb.
Ans: D
59. What is common to whale, seal and shark?
(a) thick subcutaneous fat (b) convergent evolution (c) homoiothermy (d) seasonal migration.
Ans: B
60. One of the important consequences of geographical isolation is
(a) preventing speciation (b) speciation through reproductive isolation
(c) random creation of new species (d) no change in the isolated fauna.
Ans: B
61. Lysozyme that is present in perspiration, saliva and tears, destroys
(a) certain types of bacteria (b) all viruses (c) most virus-infected cells (d) certain fungi
Ans: A
62. In the human female, menstruation can be deferred by the administration of
(a) combination of FSH and LH (b) combination of estrogen and progesterone (c) FSH only (d) LH only
Ans: B
63. Which one of the following is not a constituent of cell membrane?
(a) glycolipids (b) proline (c) phospholipids (d) cholesterol.
Ans: B
64. Compared to a bull a bullock is docile because of
(a) higher levels of cortisone (b) lower levels of blood testosterone
(c) lower levels of adrenaline/ noradrenaline in its blood (d) higher levels of thyroxine.
Ans: B
65. During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric change?
(a) first positive, then negative and continue to be positive
(b) first negative, then positive and continue to be positive.
(c) first positive, then negative and again back to positive
(d) first negative, then positive and again back to negative .
Ans: D
66. Which one of the following pairs of organisms are exotic species introduced in India ?
(a) lantana camara, water hyacinth (b) water hyacinth, prosopis cineraria
(c) nile perch, licus religiosa (d) ficus religiosa , lantana camara.
Ans: A
67. In gymnosperms, the pollen chamber represents
(a) a cavity in the ovule in which pollen grains are stored after pollination
(b) an opening in the megagametophyte through which the pollen tube approaches the egg
(c) the microsporangium in which pollen grains develop
(d) a cell in the pollen grain in which the sperms are formed.
Ans: C
68. Molecular basis of organ differentiation dpends on the modulation in transcription by
(a) ribosome (b) transcription factor (c) anticodon (d) RNA polymerase.
Ans: D
69. Which of the follwoing is an example of negative feedback loop in humans?
(a) secretion of tears after falling of sand particles into the eye. (b) salivation of mouth at the sight of delicious food
(c) secretion of sweat glands and constriction of skin blood vessels when it is too hot (d) constriction of skin blood vessels and contraction of skeletal mucles when it is too cold
Ans: D
70. The two polynucleotide chains in DNA are
(a) discontinuous (b) antiparallel (c) semiconservative(d) parallel.
Ans: B
71. Which of the following pairs are correctly matched ? Animals - Morphological features (i) Crocodile - 4-chambered heart (ii) Sea urchin - Parapodia (iii) Obelia - Thecodont (iv) Lemur - Thecodont
(a) (ii), (iii) and (iv)
(b) only (i) and (iv)
(c) only (i) and (ii)
(d) (i), (iii) and (iv)
Ans: D
72. Which one of the following pairs of structures distinguishes a nerve cell from other types of cells?
(a) vacuoles and fibres (b) flagellum and modulloary sheath
(c) nucleus and mitochondria (d) perikaryon and dendrites.
Ans: D
73. In maize, hybrid vigour is exploited by
(a) crossing of two inbred parental lines (b) harvesting seeds from the most productive plants
(c) inducing mutations (d) bombarding the seeds with DNA.
Ans: A
74. Which one of the following is a viral disease of poultry ?
(a) coryza (b) new castle disease (c) pasteurellosis (d) salmonellosis.
Ans: B
75. The wavelength of light absorbed by Pr form of phytochrome is
(a) 680 nm (b) 720 nm (c) 620 nm (d) 640 nm
Ans: A
76. Which one of the following is not a bioindicator of water pollution?
(a) blood-worms (b) stone flies (c) sewage fungus (d) sludge-worms.
Ans: B
77. Feeling the tremors of an earthquake a scared resident of seventh floor of a multistoryed building starts climbing down the stairs rapidly. Which hormone initiated this action ?
(a) adrenaline (b) glucagon (b) gastrin (d) thyroxine
Ans: A
78. “Foolish seedling’’ disease of rice led to the discovery of
(a) ABA (b) 2, 4-D (c) IAA (d) GA
Ans: D
79. Select one of the following of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms (1) Embryo development and apical meristem
(2) Absence of resin duct and leaf venation
(3) Presence of vessel elements and absence of archegonia
(4) Perianth and two integuments
Ans: 3
80. Thermococcus, Methanococcus and Methanobacterium exemplify
(1) Bacteria that contain a cytoskeleton and ribosomes
(2) Archaebacteria that contain protein homologous to eukaryotic core histones
(3) Archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
(4) Bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
Ans: 3
81. Which one of the following is heterosporous?
(1) Equisetum
(2) Dryopteris
(3) Salvinia
(4) Adiantum
Ans: 3
82. In which one of the following male and female gametophytes do not have free living independent existence?
(1) Cedrus
(2) Pteris
(3) Funaria
(4) Polytrichum
Ans: 1
(2) Absence of resin duct and leaf venation
(3) Presence of vessel elements and absence of archegonia
(4) Perianth and two integuments
Ans: 3
80. Thermococcus, Methanococcus and Methanobacterium exemplify
(1) Bacteria that contain a cytoskeleton and ribosomes
(2) Archaebacteria that contain protein homologous to eukaryotic core histones
(3) Archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
(4) Bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
Ans: 3
81. Which one of the following is heterosporous?
(1) Equisetum
(2) Dryopteris
(3) Salvinia
(4) Adiantum
Ans: 3
82. In which one of the following male and female gametophytes do not have free living independent existence?
(1) Cedrus
(2) Pteris
(3) Funaria
(4) Polytrichum
Ans: 1
83. Which one of the following phyla is correctly matched with its two general characteristics?
(1) Mollusca - Normally oviparous and development through a trochophore or veligerlarva
(2) Arthropoda - Body divided into head, thorax and abdomen and respiration by tracheae
(3) Chordata - Notochord at some stage and separate anal and urinary openings to the outside
(4) Echinodermata - Pentamerous radial symmetry and mostly internal fertilization
Ans: 1
84. Which one of the following in birds, indicates their reptilian ancestry?
(1) Eggs with a calcareous shell
(2) Scales on their hind limbs
(3) Four-chambered heart
(4) Two special chambers crop and gizzard in their digestive tract
Ans: 2
85. Ascaris is characterized by
(1) Presence of true coclom and metamerism (metamerisation)
(2) Absence of true coclom but presence of metamerism
(3) Presence of neither true coclom nor metamerism
(4) Presence of true coclom but absence of metamerism
Ans: 3
86. Which one of the following is not a characteristic of phylum Annelida?
(1) Ventral nerve cord
(2) Closed circulatory system
(3) Segmentation
(4) Pseudocoelom
Ans: 4
87. Cellulose is the major component of cell walls of
(1) Saccharomyces
(2) Pythium
(3) Xanthomonas
(4) Pseudomonas
Ans: 2
88. Vacuole in a plant cell
(1) Lacks membrane and contains water and excretory substances
(2) Is membrane-bound and contains storage proteins and lipids
(3) Is membrane-bound and contains water and excretory substances
(4) Lacks membrane and contains air
Ans: 3
89. A competitive inhibitor of succinic dehydrogenase is
(1) Malate
(2) Malonate
(3) Oxaloacetate
(4) - ketoglutarate
Ans: 2
(1) Mollusca - Normally oviparous and development through a trochophore or veligerlarva
(2) Arthropoda - Body divided into head, thorax and abdomen and respiration by tracheae
(3) Chordata - Notochord at some stage and separate anal and urinary openings to the outside
(4) Echinodermata - Pentamerous radial symmetry and mostly internal fertilization
Ans: 1
84. Which one of the following in birds, indicates their reptilian ancestry?
(1) Eggs with a calcareous shell
(2) Scales on their hind limbs
(3) Four-chambered heart
(4) Two special chambers crop and gizzard in their digestive tract
Ans: 2
85. Ascaris is characterized by
(1) Presence of true coclom and metamerism (metamerisation)
(2) Absence of true coclom but presence of metamerism
(3) Presence of neither true coclom nor metamerism
(4) Presence of true coclom but absence of metamerism
Ans: 3
86. Which one of the following is not a characteristic of phylum Annelida?
(1) Ventral nerve cord
(2) Closed circulatory system
(3) Segmentation
(4) Pseudocoelom
Ans: 4
87. Cellulose is the major component of cell walls of
(1) Saccharomyces
(2) Pythium
(3) Xanthomonas
(4) Pseudomonas
Ans: 2
88. Vacuole in a plant cell
(1) Lacks membrane and contains water and excretory substances
(2) Is membrane-bound and contains storage proteins and lipids
(3) Is membrane-bound and contains water and excretory substances
(4) Lacks membrane and contains air
Ans: 3
89. A competitive inhibitor of succinic dehydrogenase is
(1) Malate
(2) Malonate
(3) Oxaloacetate
(4) - ketoglutarate
Ans: 2
90. Polysome is formed by
(1) Ribosomes attached to each other in a linear arrangement
(2) Several ribosomes attached to a single mRNA
(3) Many ribosomes attached to a strand of endoplasmic reticulum
(4) A ribosome with several subunits
Ans: 2
91. Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (a - e) make it useful as a storage material? a. Easily translocated b. Chemical non-reactive c. Easily digested by animals d. Osmotically inactive e. Synthesized during photosynthesis The useful properties are
(1) Both a & e
(2) Both b & c
(3) Both b & d
(4) a, c & e
Ans: 3
92. In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements is true about archaea?
(1) Archaea completely differ from prokaryotes
(2) Archaea resemble eukarya in all respects
(3) Archaea have some novel features that are absent in other prokaryotes and eukaryotes
(4) Archaea completely differ from both prokaryotes and eukaryotes
Ans: 3
93. Keeping in view the 'fluid mosaic model' for the structure of cell membrane, which one of the following statements is correct w.r.t. the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?
(1) Neither lipids nor proteins can flip-flop
(2) Both lipids and proteins can flip-flop
(3) While lipids can rarely flip-flop, proteins cannot
(4) While proteins can flip-flop, lipids cannot
Ans: 3
94. In germinating seeds fatty acids are degraded exclusively in the
(1) Mitochondria
(2) Proplastids
(3) Glyoxysomes
(4) Peroxisomes
Ans: 3
95. The two sub-units of ribosome remain united at a critical ion level of
(1) Calcium
(2) Copper
(3) Manganese
(4) Magnesium
Ans: 4
96. Thron of Bougainvillea and tendril of cucurbita are example of
(1) Retrogressive evolution
(2) Analogous organs
(3) Homologous organs
(4) Vestigial organs
Ans: 3
97. Haploids are more suitable for mutation studies than the diploids. This is because
(1) All mutations, whether dominant or recessive are expressed in haploids
(2) Haploids are reproductively more stable than diploids
(3) Mutagens penetrate in haploids more effectively than diploids
(4) Haploids are more abundant in nature than diploids
Ans: 1
98. Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?
(1) Adenine, Thymine - Purines
(2) Thymine, Uracil - Pyrimidines
(3) Uracil, Cytosine - Pyrimidines
(4) Guanine, Adenine - Purines
Ans: 1
99. Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/ linkage?
(1) Down syndrome - 44 autosomes + XO
(2) Klinefelter syndrome - 44 autosomes + XXY
(3) Colour blindness - Y-linked
(4) Erythroblastosis foetalis - X-linked
Ans: 2
100. What is true about the isolated small tribal populations?
(1) There is no change in population size as they have a large gene pool
(2) There is a decline in population as boys marry girls only from their own tribe
(3) Hereditary diseases like colour blindness do not spread in the isolated population
(4) Wrestlers who develop strong body muscles in their life time pass this character on to their progeny
Ans: 2
(1) Ribosomes attached to each other in a linear arrangement
(2) Several ribosomes attached to a single mRNA
(3) Many ribosomes attached to a strand of endoplasmic reticulum
(4) A ribosome with several subunits
Ans: 2
91. Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (a - e) make it useful as a storage material? a. Easily translocated b. Chemical non-reactive c. Easily digested by animals d. Osmotically inactive e. Synthesized during photosynthesis The useful properties are
(1) Both a & e
(2) Both b & c
(3) Both b & d
(4) a, c & e
Ans: 3
92. In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements is true about archaea?
(1) Archaea completely differ from prokaryotes
(2) Archaea resemble eukarya in all respects
(3) Archaea have some novel features that are absent in other prokaryotes and eukaryotes
(4) Archaea completely differ from both prokaryotes and eukaryotes
Ans: 3
93. Keeping in view the 'fluid mosaic model' for the structure of cell membrane, which one of the following statements is correct w.r.t. the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?
(1) Neither lipids nor proteins can flip-flop
(2) Both lipids and proteins can flip-flop
(3) While lipids can rarely flip-flop, proteins cannot
(4) While proteins can flip-flop, lipids cannot
Ans: 3
94. In germinating seeds fatty acids are degraded exclusively in the
(1) Mitochondria
(2) Proplastids
(3) Glyoxysomes
(4) Peroxisomes
Ans: 3
95. The two sub-units of ribosome remain united at a critical ion level of
(1) Calcium
(2) Copper
(3) Manganese
(4) Magnesium
Ans: 4
96. Thron of Bougainvillea and tendril of cucurbita are example of
(1) Retrogressive evolution
(2) Analogous organs
(3) Homologous organs
(4) Vestigial organs
Ans: 3
97. Haploids are more suitable for mutation studies than the diploids. This is because
(1) All mutations, whether dominant or recessive are expressed in haploids
(2) Haploids are reproductively more stable than diploids
(3) Mutagens penetrate in haploids more effectively than diploids
(4) Haploids are more abundant in nature than diploids
Ans: 1
98. Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?
(1) Adenine, Thymine - Purines
(2) Thymine, Uracil - Pyrimidines
(3) Uracil, Cytosine - Pyrimidines
(4) Guanine, Adenine - Purines
Ans: 1
99. Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/ linkage?
(1) Down syndrome - 44 autosomes + XO
(2) Klinefelter syndrome - 44 autosomes + XXY
(3) Colour blindness - Y-linked
(4) Erythroblastosis foetalis - X-linked
Ans: 2
100. What is true about the isolated small tribal populations?
(1) There is no change in population size as they have a large gene pool
(2) There is a decline in population as boys marry girls only from their own tribe
(3) Hereditary diseases like colour blindness do not spread in the isolated population
(4) Wrestlers who develop strong body muscles in their life time pass this character on to their progeny
Ans: 2