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

  • question_answer
    With regard to mature mRNA in eukaryotes   

    A) exons and introns do not appear in the mature RNA

    B) exons appear, but introns do not appear in the mature RNA

    C) introns appear, but exons do not appear in the mature RNA

    D) Both exons and introns appear in the mature RNA

    Correct Answer: B

    Solution :

    [b] In mRNA of eukaryotes exons appear, but introns do not. This is because introns are intervening or non-coding sequences and exons are coding or expressed sequences. Through splicing introns are removed and exons are joined to form mRNA.


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