Multiple Choice Questions

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Mutation is more common when it is present in:

  • dominant condition

  • recessive condition

  • constant in population

  • none of the above


A.

dominant condition

Mutation is present in dominant condition because dominant mutant gene can express in both homozygous and heterozygous condition. While recessive gene can express only in homozygous condition.


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A eukaryotic gene contains two kinds of base sequences. Which of these plays an important role in protein synthesis?

  • Introns

  • Exons

  • Both 'a' and 'b'

  • None of the above


The number of hydrogen bonds between adenine and thymine in a DNA molecule is :

  • two

  • three

  • four

  • eight


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

  • m-RNA

  • r -RNA

  • t-RNA

  • hn -RNA


Sequence of DNA (Non- coding) is known as:

  • exon

  • intron

  • cistron

  • none


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In DNA, which is absent ?

  • Adenine

  • Guanine

  • Uracil

  • Cytosine


The process of multiplication of DNA from DNA is known as

  • replication

  • transversion

  • transcription

  • translation


In DNA, which is absent :

  • Adenine

  • Thymine

  • Guanine

  • Uracil


Enzyme required for transcription is

  • RNAse

  • Endonuclease

  • RNA polymerase

  • DNA polymerase


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Which is called soluble RNA ?

  • rRNA

  • tRNA

  • mRNA

  • hnRNA


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