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28 February, 18:29

If a strand of DNA is 7% Adenine, what percent Cytosine is it?

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  1. 28 February, 20:44
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    43 % cytosine

    Explanation:

    The complementary base pairs in DNA are A-T and C-G.

    Thus, if the strand is 7 % A, it is also 7 % T.

    If 14 % of DNA is A-T base pairs, it is 86 % C-G.

    Half of the 86 % is C, so the DNA is

    43 % cytosine
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