Which base pairs with Adenine in DNA?

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Multiple Choice

Which base pairs with Adenine in DNA?

Explanation:
In DNA, bases pair specifically to keep the double helix uniform and allow accurate replication. Adenine always pairs with thymine through two hydrogen bonds, which maintains the consistent width of the DNA ladder. The other bases pair differently—cytosine pairs with guanine, forming three hydrogen bonds—so adenine does not pair with them. This complementary pairing follows Chargaff’s rule, where A equals T and C equals G. Therefore, thymine is the base that pairs with adenine.

In DNA, bases pair specifically to keep the double helix uniform and allow accurate replication. Adenine always pairs with thymine through two hydrogen bonds, which maintains the consistent width of the DNA ladder. The other bases pair differently—cytosine pairs with guanine, forming three hydrogen bonds—so adenine does not pair with them. This complementary pairing follows Chargaff’s rule, where A equals T and C equals G. Therefore, thymine is the base that pairs with adenine.

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