JEE Main Chemistry question

The hydrogen bonding for the base pairs of DNA is between

(A)Amide carbonyl and only
(B)Amide N–H and cyclic amine nitrogen only
(C)Alcohols and carbonyls only
(D)Both (a) and (b)Correct

Answer: (D)

Solution

Watson–Crick base pairing involves hydrogen bonds between the carbonyl oxygen of one base and an amino (–NH₂) group of the complementary base, as well as between an amide N–H and a ring (cyclic amine) nitrogen of the complementary base — both types of

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Question ID VK-150827