JEE Main & Advanced Chemistry Biomolecules / जैव-अणु Question Bank Vitamins Hormones and Nucleic Acids

  • question_answer
    In DNA, the complementary bases are   [CBSE PMT 1998]

    A)                 Uracil and adenine; cytosine and guanine

    B)                 Adenine and thymine; guanine and cytosine

    C)                 Adenine and thymine; guanine and uracil

    D)                 Adenine and guanine; thymine and cytosine

    Correct Answer: B

    Solution :

                    \[\underset{\text{2 hydrogen bonds}}{\mathop{\text{Adenine}=\text{Thymine}}}\,\text{,}\,\underset{\text{3 hydrogen bonds}}{\mathop{\text{Guanine}\equiv \text{Cytosine}}}\,\]


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