Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

51.

Living in same habitat organisms of same species from:

  • biosphere

  • community

  • population

  • niche


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52.

Which of the following constitute about 10-20% of total circular RNA?

  • m-RNA

  • r -RNA

  • t-RNA

  • hn -RNA


C.

t-RNA

Transfer RNA (t-RNA) constitute about 10-20% of total cellular RNA. Since t-RNA are difficult to be separated by ultra- centrifugation, they are also called as soluble RNA (s-RNA).


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53.

Jumping genes in maize were discovered by:

  • Hugo de Vries

  • T.H. Morgan

  • Barbara McClintock

  • Mendel


54.

Innitiation codon is :

  • AUG

  • UUU

  • UAG

  • AAG


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55.

Which statement is incorrect ?

  • Plant viruses contain RNA

  • Animal viruses contain DNA

  • T4 contains double strand DNA

  • TMV contains double stranded RNA


56.

Pollination occuring from one flower to another of same plant is :

  • autogamy

  • allogamy

  • geitenogamy

  • none of these


57.

Aleuron layer is found in :

  • embryo

  • nucellus

  • endosperm

  • endodermis


58.

By anaerobic process, the cow dung is used to produce :

  • methane

  • butane

  • ethane

  • propane


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59.

'Heterosis' is related to :

  • cloning

  • selection

  • hybridization

  • introduction


60.

Non-coding sequences of DNA are:

  • exon

  • intron

  • rhizoids

  • cistron


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