Multiple Choice Questions

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Non-coding sequences of DNA are:

  • exon

  • intron

  • rhizoids

  • cistron


A.

exon

A segment of DNA that is both transcribed into RNA and translated into protein is called exon whereas the segment of DNA that is transcribed from eukaryotic DNA but removed before the mature m-RNA is translated into protein is called Introns.


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

  • autogamy

  • allogamy

  • geitenogamy

  • none of these


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

  • m-RNA

  • r -RNA

  • t-RNA

  • hn -RNA


Jumping genes in maize were discovered by:

  • Hugo de Vries

  • T.H. Morgan

  • Barbara McClintock

  • Mendel


Living in same habitat organisms of same species from:

  • biosphere

  • community

  • population

  • niche


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Aleuron layer is found in :

  • embryo

  • nucellus

  • endosperm

  • endodermis


Innitiation codon is :

  • AUG

  • UUU

  • UAG

  • AAG


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

  • methane

  • butane

  • ethane

  • propane


Which statement is incorrect ?

  • Plant viruses contain RNA

  • Animal viruses contain DNA

  • T4 contains double strand DNA

  • TMV contains double stranded RNA


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'Heterosis' is related to :

  • cloning

  • selection

  • hybridization

  • introduction