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2nd September 2015, 11:58 AM
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Join Date: May 2012
Re: Answer key of CBSE NEET exam

As you want to get the answer key of CBSE NEET 2013 Under Graduate exam so here is the information of the same for you:

1. The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function. This is an example of :
(1) Analogous organs that have evolved due to divergent evolution
(2) Homologous organs that have evolved due to convergent evolution
(3) Homologous organs that have evolved due to divergent evolution
(4) Analogous organs that have evolved due to convergent evolution
Ans. (4)

2. Select the correct statement with respect to locomotion in humans:
(1) The joint between adjacent vertebrae is a fibrous joint
(2) A decreased level of progesterone causes osteoporosis in old people
(3) Accumulation of uric acid crystals in joints causes their inflammation
(4) The vertebral column has 10 thoracic vertebrae
Ans. (3)

3. A phosphoglyceride is always made up of :
(1) a saturated or unsaturated fatty acid esterified to a phosphate group which is also attached to a glycerol molecule
(2) only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
(3) only a unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group
is also attached
(4) a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
Ans. (4)

4. Perisperm differs from endosperm in:
(1) its formation by fusion of secondary nucleus with several sperms
(2) being a haploid tissue
(3) having no reserve food
(4) being a diploid tissue
Ans. (4)

5. A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is :
(1) Amensalism
(2) Ectoparasitism
(3) Symboisis
(4) Commensalism
Ans. (4)

6. The cell-mediated immunity inside the human body is carried out by :
(1) Erythrocytes
(2) T-lymphocytes
(3) B-lymphocytes
(4) Thrombocytes
Ans. (2)

7. Which of the following are likely to be present in deep sea water ?
(1) Saprophytic fungi
(2) Archaebacteria
(3) Eubacteria
(4) Blue-green algae
Ans. (2)

8. One of the representatives of Phylum Arthropoda is :
(1) flying fish
(2) cuttlefish
(3) silverfish
(4) pufferfish
Ans. (3)

9. Megasporangium is equivalent to :
(1) Ovule
(2) Embryo sac
(3) Fruit
(4) Nucellus
Ans. (1)

10. Kyoto Protocol was endorsed at :
(1) CoP - 4 (2) CoP - 3
(3) CoP - 5 (4) CoP - 6
Ans. (2)

12. In china rose the flowers are :
(1) Zygomorphic, epigynous with twisted aestivation
(2) Actinomorphic, hypogynous with twisted aestivation
(3) Actinomorphic, epigynous with valvate aestivation
(4) Zygomorphic, hypogynous with imbricate aestivation
Ans. (2)

13. The Golgi complex plays a major role :
(1) in post translational modification of proteins and glycosidation of lipids
(2) in trapping the light and transforming it into chemical energy
(3) in digesting proteins and carbohydrates
(4) as energy transferring organelles
Ans. (1)

14. What external changes are visible after the last moult of a cockroach nymph?
(1) Labium develops
(2) Mandibles become harder
(3) Anal cerci develop
(4) Both fore wings with hind wings develop
Ans. (4)

15. Isogamous condition with non-flagallated gametes is found in :
(1) Fucus (2) Chlamydomonas
(3) Spirogyra (4) Volvox
Ans. (3)

18. The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of :
(1) Inactivation of glycosidase enzyme in recombinant bacteria
(2) Non-recombinant bacteria containing betagalactosidase
(3) Insertional inactivation of alpha-galactosidase in non-recombinant bacteria
(4) Insertional inactivation of alpha-galactosidase in recombinant bacteria
Ans. (2)

19. Monoecious plant of Chara shows occurrence of :
(1) upper oogonium and lower antheridium on the same plant
(2) antheridiophore and archegoniophore on the same plant
(3) stamen and carpel on the same plant
(4) upper antheridium and lower oogonium on the same plant
Ans. (1)

20. Advantage of cleistogamy is :-
(1) Vivipary
(2) Higher genetic variability
(3) More vigorous offspring
(4) No dependence on pollinators
Ans. (4)

21. The H-zone in the skeletal muscle fibre is due to :
(1) extension of myosin filaments in the central portion of the A-band
(2) the absence of myofibrils in the central portion of A-band
(3) the central gap between myosin filaments in the A-band
(4) the central gap between actin filaments extending through myosin filaments in the Aband
Ans. (4)

22. Artificial insemination means :
(1) introduction of sperms of a healthy donor directly into the ovary
(2) yransfer of sperms of a healthy donor to a test tube containing ova
(3) transfer of sperms of husband to a test tube containing ova
(4) artificial introduction of sperms of a healthy donor into the vagina
Ans. (4)

23. Which group of animals belong to the same phylum?
(1) Sponge, Sea anemone, Starfish
(2) Malarial parasite, Amoeba, Mosquito
(3) Earthworm, Pinworm, Tapeworm
(4) Prawn, Scorpion, Locusta
Ans. (4)

24. Seed coat is not thin, membranous in :
(1) Gram (2) Maize
(3) Coconut (4) Groundnut
Ans. (3)

25. If two persons with 'AB' blood group marry and have sufficiently large number of children, these children could be classified as 'A' blood group : 'AB' blood group 'B' blood group in 1 : 2 : 1 ratio. Modern technique of protein electrophoresis reveals presence of both 'A' and 'B' type proteins in 'AB' blood group individuals. This is an example of :
(1) Complete dominance
(2) Codominance
(3) Incomplete dominance
(4) Partial dominance
Ans. (2)

26. Which of the following cannot be detected in a developing foetus by amniocentesis ?
(1) Jaundice
(2) Klinefelter syndrome
(3) Sex of the foetus
(4) Down syndrome
Ans. (1)

27. The first stable product of fixation of atmospheric nitrogen in leguminous plants is :
(1) Glutamate (2) NO2 –
(3) Ammonia (4) NO3–
Ans. (3)

28. A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is :
(1) Zero (2) 10
(3) 15 (4) 05
Ans. (1)

29. Secondary productivity is rate of formation of new organic matter by :
(1) Decomposer
(2) Producer
(3) Parasite
(4) Consumer
Ans. (4)

30. Infection of Ascaris usually occurs by :
(1) mosquito bite
(2) drinking water containing eggs of Ascaris
(3) eating imperfectly cooked pork.
(4) Tse-tse fly
Ans. (2)

For more detailed information I am uploading PDF files which are free to download:
Attached Files
File Type: pdf Answer key of CBSE NEET 2013 Under Graduate exam.pdf (475.9 KB, 217 views)


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