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27 October, 18:48

The structure of dna is held together by?

A. purines pairing with pyridimines

B. hydrogen bonds between adenine and thymine

C. attraction between cytosine and guanine.

D. All of the above

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Answers (1)
  1. 27 October, 22:32
    0
    B

    Explanation:

    nitrogenous bases on the two strands of DNA pair up, held together by weak hydrogen bonds.
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