Multiple Choice Questions

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'Heterosis' is related to :

  • cloning

  • selection

  • hybridization

  • introduction


C.

hybridization

Heterosis was used by shull in 1814. It is the superiority of on F1 hybrid over both its parents in terms of yield or some other characters.


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

  • m-RNA

  • r -RNA

  • t-RNA

  • hn -RNA


Aleuron layer is found in :

  • embryo

  • nucellus

  • endosperm

  • endodermis


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

  • autogamy

  • allogamy

  • geitenogamy

  • none of these


Non-coding sequences of DNA are:

  • exon

  • intron

  • rhizoids

  • cistron


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Which statement is incorrect ?

  • Plant viruses contain RNA

  • Animal viruses contain DNA

  • T4 contains double strand DNA

  • TMV contains double stranded RNA


Jumping genes in maize were discovered by:

  • Hugo de Vries

  • T.H. Morgan

  • Barbara McClintock

  • Mendel


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

  • methane

  • butane

  • ethane

  • propane


Living in same habitat organisms of same species from:

  • biosphere

  • community

  • population

  • niche


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Innitiation codon is :

  • AUG

  • UUU

  • UAG

  • AAG