In DNA base pairing, which base pairs with Cytosine?

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Multiple Choice

In DNA base pairing, which base pairs with Cytosine?

Explanation:
In DNA, bases pair in a way that keeps the double helix width uniform, with a pyrimidine pairing with a purine. Cytosine is a pyrimidine, so it pairs with Guanine, a purine, forming three hydrogen bonds. That stronger C–G pairing helps stabilize regions rich in GC content. By contrast, Adenine pairs with Thymine in DNA (two hydrogen bonds), and in RNA, Uracil pairs with Adenine. So the partner for Cytosine in DNA is Guanine.

In DNA, bases pair in a way that keeps the double helix width uniform, with a pyrimidine pairing with a purine. Cytosine is a pyrimidine, so it pairs with Guanine, a purine, forming three hydrogen bonds. That stronger C–G pairing helps stabilize regions rich in GC content. By contrast, Adenine pairs with Thymine in DNA (two hydrogen bonds), and in RNA, Uracil pairs with Adenine. So the partner for Cytosine in DNA is Guanine.

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