Molecular Basis of Inheritance

Multiple Choice Questions

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Stop codons are

  • AUG, GUG

  • UAA, UGA, UAG

  • UAC, UGG

  • AGU, AGA, UAC

B.

UAA, UGA, UAG

UAG, UAA, UGA are three stop codons or non- sense codons. They do not code for any amino acid.

AUG works as an initiation codon in both prokaryotes and eukaryotes. In rare cases, GUG is used as an initiation codon in bacterial protein synthesis.

AUG is used to code for tyrosine, UGG codes for tryptophan, AGU codes for serine and AGA codes for argenine.

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    The back bone of RNA consists of which of the following sugar?

    • Deoxyribose

    • Ribose

    • Sucrose

    • Maltose

    Answer

    Repressor protein is produced by

    • regulator gene

    • operator gene

    • structural gene

    • promoter gene

    Answer

    DNA mutiplication is called

    • translation

    • replication

    • transduction

    • transcription

    Answer

    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 these

    Answer
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    Initiation codon is

    • UUU

    • UGA

    • AUG

    • UAG

    Answer

    Balbiani rings are the structural features of

    • allosomes

    • polytene chromosomes

    • autosomes

    • lampbrush chromosomes

    Answer

    DNA element with ability to change position is called

    • cistron

    • transposon

    • intron

    • recon

    Answer

    Jumping genes in maize were discovered by

    • Hugo de Vries

    • Barbara McClintock

    • T H Morgan

    • Mendel

    Answer
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    Which of the following is not a Pyrimidine?

    • Thymine

    • Uracil

    • Guanine

    • Cytosine

    Answer
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