AFMC Biology 1999


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  • AFMC Biology 1999

    1. 1. aFMC–Past papers<br />BIOLOGY- UNSOLVED PAPER - 1999<br />
    2. 2. SECTION – I (Total Marks : 50)<br />Single Correct Answer Type<br />There are five parts in this question. Four choices are given for each part and one of them is correct. Indicate you choice of the correct answer for each part in your answer-book by writing the letter (a), (b), (c) or (d) whichever is appropriate<br />.<br />
    3. 3. 01<br />Problem<br />Formation of primitive streak in the chick embryo is the first sign of<br />Notogenesis<br />Nlastulation<br />Neurilation<br />Gastrulation.<br />
    4. 4. Problem<br />02<br />Which hormone promotes cell division, protein synthesis and bone growth?<br />PTH <br />ACTH<br />ADH <br />GH<br />
    5. 5. Problem<br />03<br />Which of the following has non-myelinatednervefibres?<br />Optic nerves<br />Autonomic nerves<br />Cranial nerves <br />Spinal nerves<br />
    6. 6. Problem<br />04<br />Which of the following is true about cleavage in the fertilised egg in humans?<br />It is identical to the normal mitosis<br />It starts when the egg is in fallopian tube<br />It starts when the egg reaches uterus<br />It is meroblastic<br />
    7. 7. Problem<br />05<br />Mammalian brain differs from an amphibian brain in possessing<br />Olfactory lobe <br />Hypothalamus<br />Cerebellum<br />Corpus callosum<br />
    8. 8. Problem<br />06<br />Jacobson's organ is concerned with<br />Touch<br />Hearing<br />Smell<br />Sight<br />
    9. 9. Problem<br />07<br />Adjacent epithelial cells are held together by<br />Iysosomes<br />Glyoxysomes<br />Desmosomes<br />Microsomes <br />
    10. 10. Problem<br />08<br />Which of the following is true for DNA helices?<br />DNA helices are ATP dependent unwinding enzymes<br />Promote separation of the two parental strands and establish replication forks<br />DNA helices hydrolyze ATP <br />All of these<br />
    11. 11. Problem<br />09<br />What is the name of cycle which generates energy and splits water into hydrogen and oxygen?<br />Glycogenolysis<br />Citric acid cycle<br />Photophosphorylation<br />Electron transport chain<br />
    12. 12. Problem<br />10<br />Tendons and ligaments are tissues of the category of<br />vascular tissue<br />Epithelial tissue<br />Skeletal tissue<br />Connective tissue<br />
    13. 13. Problem<br />11<br />Antedon belongs to<br />Asteroida<br />Crinoidea<br />Ophiuroidea<br />Echinoidea<br />
    14. 14. Problem<br />12<br />Sub-class prototheria is related with egg laying mammals such as<br />Kangaroo <br />Echidna<br />Ornithorhynchus<br />Both (b) and (c)<br />
    15. 15. Problem<br />13<br />The maintenance of internal favourable conditions, by a self regulated mechanisms, in spite of the fact that there are changes in the environment, is known as<br />Enthalpy <br />Steady state<br />Entropy <br />Homeostasis<br />
    16. 16. Problem<br />14<br />RNA retroviruses have a special enzyme that<br />Disintegrates host DNA<br />Polymerises host DNA<br />Transcribe viral RNA to c-DNA<br />Translates host DNA.<br />
    17. 17. Problem<br />15<br />The nephrostomes, in the kidneys, are functional in<br />Adult frog<br />Cockroach<br />Tadpole <br />Rabbit<br />
    18. 18. Problem<br />16<br />Bidder's canal is found in<br />Kidney of frog<br />Kidney of mammal<br />Ovary of mammal<br />Testes of frog<br />
    19. 19. Problem<br />17<br />The main function of Henle's loop is<br />Passage of urine<br />Filtration of blood<br />Formation of urine<br />Conservation of water<br />
    20. 20. Problem<br />18<br />Peeling of ozone umbrella, which protects us from UV-rays, is caused by<br />C02<br />PAN<br />CFCs<br /> Coal burning<br />
    21. 21. Problem<br />19<br />The correct sequence of food chain is<br />grass -> wolf-> deer ->buffalo<br />grass ->insect-> birds-> snake<br />bacteria -> grass-> rabbit-> wolf<br />grass -> snake -> insect -> deer<br />
    22. 22. Problem<br />20<br />Sickle-cell anaemia is one of the good examples for which of the following?<br />Pleiotropy<br />Co-dominance<br />Epistasis<br />Incomplete dominance<br />
    23. 23. Problem<br />21<br />Diphtheria is caused by which of the following?<br />Virus<br />Fungi<br />Bacteria<br />Algae <br />
    24. 24. Problem<br />22<br />Ancestral amphibians were tetrapods that evolved during<br />Jurassic period <br />Cretaceous period<br />Devonian period<br />Carboniferous period<br />
    25. 25. Problem<br />23<br />During elongation of polypeptide chain (in translation), the sigma factor is<br />Used during the closing of chain<br />Released to take part again<br />Retained and it performs special function<br />Functionless<br />
    26. 26. Problem<br />24<br />Which of the following is a salt balancing hormone?<br />Folliotropin<br />Glucocorticoid<br />Somatotrophin<br />Mineralocorticoid<br />
    27. 27. Problem<br />25<br />The term 'niche' of a species refers to<br />Specific place where an organism lives<br />Competitive power of an organism<br />Specific function of organism<br />Specific and habitual function<br />
    28. 28. Problem<br />26<br />Pyramid of energy, in a pond ecosystem, is always<br />Upright only <br />Irregular<br />Inverted <br />Linear<br />
    29. 29. Problem<br />27<br />The treeless biomes include<br />Tundra <br />Deserts<br />Grassland<br /> All of these<br />
    30. 30. Problem<br />28<br />When fungi feed on dead organic matter, they are known as<br />Parasites<br />Saprophytes<br />Dimorphic<br />None of these<br />
    31. 31. Problem<br />29<br />The antherozoids of Marchantia are<br />Short, curved and biflagellate<br />Long, straight and biflagellate<br />Short, straight and multiflagellate<br />Long curved and biflagellate<br />
    32. 32. Problem<br />30<br />Gymnosperms lack fruit, because they lack<br />Ovule<br />Seed<br />Ovary<br /> Embryo <br />
    33. 33. Problem<br />31<br />Territoriality occurs as a result of<br />Predation<br />Competition<br />Co-operation<br />Parasitism<br />
    34. 34. Problem<br />32<br />In monocots, grafting is almost impossible because they lack<br />Vascular bundle<br />Parenchymatous cells<br />Ground tissue<br />Cambium<br />
    35. 35. Problem<br />33<br />The thurioside is a proteinaceous toxin, which is obtained from<br />Green manure <br />Farmyard manure<br />Bacterial origin<br />Biofertilisers<br />
    36. 36. Problem<br />34<br />Which of the following statements is correct?<br />Legumes fix nitrogen only through specialized bacteria that live in their leaves<br />Legumes fix nitrogen independently of the specialized bacteria that live in their roots<br />Legumes fix nitrogen only through the specialized bacteria that live in their roots<br />Legumes are incapable of fixing nitrogen.<br />
    37. 37. Problem<br />35<br />The mutations can be induced in bacteria by<br />Growing different strains<br />Adding all required substances<br />Exposure to high energy radiations<br />Starving the bacteria<br />
    38. 38. Problem<br />36<br />From which of the following is agar obtained ?<br />Gelidium<br />Batrachospermum<br />Gracilaria<br />All of these<br />
    39. 39. Problem<br />37<br />Most of the water, in mature plant cells, occurs chiefly in which of the following?<br />Cell wall<br />Cytoplasm<br />Vacuoles<br />Nucleus<br />
    40. 40. Problem<br />38<br />How many meiotic divisions are required to produce 100 pollen grains?<br />70<br />25<br />125<br />100<br />
    41. 41. Problem<br />39<br />Anaerobic respiration is also called<br />Fragmentation<br />Multiplication<br />Fermentation<br />Restoration<br />
    42. 42. Problem<br />40<br />The closing and opening of the leaves of Mimosa pudica is due to<br />Hydrotropic movement<br />Chemonastic movement<br />Seismonastic movement<br />Thermonastic movement.<br />
    43. 43. Problem<br />41<br />The soil particles, particularly clay and organic matter in soil, contain negative charges that attract positively charged ions such as<br /> K++<br />Mg+<br />Ca++<br />All of these<br />
    44. 44. Problem<br />42<br />In double fertilization, the male gamete and secondary nucleus give rise to<br />Embryo<br />Gametes<br />Egg<br />Endosperm<br />
    45. 45. Problem<br />43<br />Radioactive tracer studies with ,4C have confirmed that<br />Phloem transports organic nutrients<br />Xylem transports organic nutrients<br />Phloem transports inorganic nutrients<br />Xylem transports organic nutrients<br />
    46. 46. Problem<br />44<br />A clone is a group of individuals obtained through<br />Cross-pollination <br />Self-pollination<br />Vegetative propagation<br />Hybridization<br />
    47. 47. Problem<br />45<br />Which of the following eras, in geological time- scale, corresponds to the period when life had not originated upon the earth?<br />Mesozoic<br />Archaeozoic<br />Palaeozoic<br />Azoic.<br />
    48. 48. Problem<br />46<br />The crossing over frequency is proportional to<br />Haploid number of chromosome<br />Diploid number of chromosome<br />Recombinant phenotypic frequency<br />Genotypic frequency<br />
    49. 49. Problem<br />47<br />The polytene chromosomes were discovered for the first time in<br />Drosophila<br />Muscadomestica<br />Chironomos<br />Muscanebulo<br />
    50. 50. Problem<br />48<br />In submerged plants, the stomata lie on<br />Not on any surface<br />Both upper and lower surfaces<br />Upper surface <br />Lower surface<br />
    51. 51. Problem<br />49<br />A fruit, developing from an inflorescence, is called<br />Etaerio of achenes<br />Composite fruit<br />Etaerio<br />None of these<br />
    52. 52. Problem<br />50<br />Beauty of flower Bougainvillea is due to<br />Androecium<br />Bract<br />Calyx<br />Corolla<br />
    53. 53. For solution visit<br />