Molecular Basis of Inheritance

Multiple Choice Questions

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Jumping genes in maize were discovered by

  • Hugo de Vries

  • Barbara McClintock

  • T H Morgan

  • Mendel

B.

Barbara McClintock

Barbara McClintock discovered  'Jumping genes' or 'movable genetic elements' in maize. These can move from one location to another on the chromosome.

R W Hedges and A E Jacob (1974) introduced the term 'transposon' to jumping genes.

Hugo de Vries introduced the term 'mutation'.

T H Morgan proposed the 'gene theory' and crossing over.

Gregor Johann Mendel (1822- 1884) is known as the 'Father of Genetics'. It leads to the formulation of laws of inheritance which was carried out by Mendel.

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    Stop codons are

    • AUG, GUG

    • UAA, UGA, UAG

    • UAC, UGG

    • AGU, AGA, UAC

    Answer

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

    • Deoxyribose

    • Ribose

    • Sucrose

    • Maltose

    Answer

    Balbiani rings are the structural features of

    • allosomes

    • polytene chromosomes

    • autosomes

    • lampbrush chromosomes

    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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    DNA mutiplication is called

    • translation

    • replication

    • transduction

    • transcription

    Answer

    DNA element with ability to change position is called

    • cistron

    • transposon

    • intron

    • recon

    Answer

    Repressor protein is produced by

    • regulator gene

    • operator gene

    • structural gene

    • promoter gene

    Answer

    Initiation codon is

    • UUU

    • UGA

    • AUG

    • UAG

    Answer
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    Which of the following is not a Pyrimidine?

    • Thymine

    • Uracil

    • Guanine

    • Cytosine

    Answer
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