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Which describes the correct pairing of DNA bases?
O A. T with C, and A with G
OB. T with T, and C with C
O C. T with A, and C with G
O D. T with G, and A with C

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Answer:

[tex] \boxed{C. \: T \: with \: A, \: and \: C \: with \: G} [/tex]

Explanation:

In dsDNA the bases in the two strands are paired through hydrogen bonds forming base pairs (bp). Adenine forms two H-bonds with thymine from opposite strand and vice-versa. Similarly, guanine is bonded with cytosine with three H-bonds. As a result, always a purine comes opposite to a pyrimidine.

A - T   &   G - C

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