Which base pairs with Adenine in DNA?

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Multiple Choice

Which base pairs with Adenine in DNA?

Explanation:
DNA base pairing follows a specific complementary rule to keep the double helix uniform in width. Adenine forms two hydrogen bonds with thymine, so each A on one strand pairs with a T on the opposite strand. This A–T pairing, together with G–C pairing, reflects Chargaff’s rules and the geometry of the bases that fits the helix structure. Uracil pairs with adenine in RNA, not DNA, while cytosine pairs with guanine and guanine pairs with cytosine. So, in DNA, the partner of adenine is thymine.

DNA base pairing follows a specific complementary rule to keep the double helix uniform in width. Adenine forms two hydrogen bonds with thymine, so each A on one strand pairs with a T on the opposite strand. This A–T pairing, together with G–C pairing, reflects Chargaff’s rules and the geometry of the bases that fits the helix structure. Uracil pairs with adenine in RNA, not DNA, while cytosine pairs with guanine and guanine pairs with cytosine. So, in DNA, the partner of adenine is thymine.

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