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  5. Molecular basis of Inheritance / विरासत का आणविक आधार

12th Class Biology Molecular basis of Inheritance / विरासत का आणविक आधार Question Bank MCQs - Molecular Basis of Inheritance

  • question_answer
    The accessibility of the promoter regions of prokaryotic DNA is (in many cases) regulated by the interaction of proteins with the sequences termed as

    A) regulator           

    B) promoter

    C) operator         

    D) structural genes

    Correct Answer: C

    Solution :

    [c] In the operon system, the promoter is generally situated beside the operator genes. In the prokaryotes, the working of promote region (binding of RNA polymerase) is coordinated by the operator genes, e.g. if operator genes are occupied by the represser proteins then RNA polymerase does not bind to the promoter gene and there is no transcription.


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