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NEET Biology Principle Of Inheritance And Variation Question Bank Critical Thinking

  • question_answer
    Arrangement of DNA has the triplet base sequence AAC GAC AGC GGC ACA AAA. Due to mutation, the first base only got deleted. Then the likely effect of this on the coding of the DNA segment is that [AIIMS 1980]

    A) The first amino acid will be different and all others will be like the earlier polypeptide

    B) The polypeptide will have one amino acid less

    C) There will be a complete change in the types and sequence of amino acid

    D) There will be no change in the polypeptide chain formed

    Correct Answer: B

    Solution :

    On the deletion of first base of triplat, the polypeptide will have one amino acid less in the DNA segment because each triplet representing one amino acid of a polypeptide.


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