Respuesta :

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Answer:

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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