Which base pairs with cytosine in DNA?

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Multiple Choice

Which base pairs with cytosine in DNA?

Explanation:
In DNA, bases pair in a way that keeps the double helix width constant and provides stable hydrogen bonding. Cytosine pairs with guanine because they form three hydrogen bonds, which is more than the two hydrogen bonds formed between adenine and thymine. This C–G pairing contributes to the overall stability of the DNA molecule and fits the purine–pyrimidine pairing rule that helps maintain consistent spacing along the helix. Therefore, the base that pairs with cytosine is guanine.

In DNA, bases pair in a way that keeps the double helix width constant and provides stable hydrogen bonding. Cytosine pairs with guanine because they form three hydrogen bonds, which is more than the two hydrogen bonds formed between adenine and thymine. This C–G pairing contributes to the overall stability of the DNA molecule and fits the purine–pyrimidine pairing rule that helps maintain consistent spacing along the helix. Therefore, the base that pairs with cytosine is guanine.

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