BotanyWhich of the following is not the correct salient feature of double-helix structure of DNA?

Which of the following is not the correct salient feature of double-helix structure of DNA?

  1. A

    Two polynucleotide chains have backbone of sugar and phosphate and bases project inside

  2. B

    Two chains have antiparallel polarity, i.e. one is 5' → 3' and other is 3' → 5'

  3. C

    Adenine forms three hydrogen bonds with thymine and guanine forms two hydrogen bonds with cytosine

  4. D

    The plane of one base pair stacks over the other in double helix in addition to H-bond to confer extra stability to helical structure

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    Solution:

    Adenine forms two hydrogen bonds with thymine of the opposite strand and vice-versa. on the other hand, guanine is bounded with cytosine with three H-bonds.

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