Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

51.

Gametes formation in animals is found in

  • ovaries

  • gonads

  • gall bladder

  • testes


52.

Hydra is

  • herbivorous

  • more developed

  • carnivorous

  • omnivorous


53.

Mycoplasma is resistant for

  • penicillin

  • tetracycline

  • streptomycin

  • All of the above


54.

The reduction division in chromosomes takes place in

  • pollen grains

  • tapetum

  • megaspore cell

  • megaspore mother cell


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55.

The RNA found in eukaryotic ribosomes are

  • 5 S and 16 S RNA

  • 5 S, 16 S, 18 S RNA

  • 23S, 16 S, RNA

  • 5 S and 28 S RNA


D.

5 S and 28 S RNA

Eukaryotic ribosomes have two unequal subunits, small subunit (40S) and large subunit (60S). Large subunit consists of 28S rRNA and 5S rRNA. It also consists of 5.8S rRNA. Small subunit consists of 18S rRNA.


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56.

The biomass pyramid of forest ecosystem is

  • linear

  • inverted

  • tetra angle

  • upright


57.

After pollination the number of chromosome in egg will be

  • n

  • 2n

  • 3n

  • None of these


58.

Double fertilisation is the

  • fertilisation of two eggs in an embryo sac

  • fusion of one male gamete with the egg cell and another male gamete with the secondary nuclei

  • fusion of two male gametes with two polar nuclei

  • fusion of one male gamete with secondary nucleus


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59.

In lysogenic phase which of the following takes place?

  • Phage DNA integrated with host genome and does not multiplied

  • Phage DNA does not integrate with host genome

  • Phage DNA integrates with host genome and bacterial cell does not lyse

  • Phage DNA integrated with host DNA and multiplied


60.

The development ofsporangium in Pteridium is

  • a leptosporangiate type

  • an eusporangiate type

  • Both (a) and (b)

  • None of the above


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