In DNA, which base pairs with adenine?

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Study for the Biochemistry Module 6 Exam. Study with flashcards and multiple choice questions; each question includes hints and explanations. Gear up to ace your test!

Multiple Choice

In DNA, which base pairs with adenine?

Explanation:
DNA base pairing follows a pattern that keeps the double helix width uniform: a purine pairs with a pyrimidine. Adenine forms two hydrogen bonds specifically with thymine, so in DNA the complementary partner for adenine is thymine. This pairing is distinct from cytosine–guanine, which pair with each other, and from uracil, which is used with adenine in RNA rather than in DNA. So thymine is the base that pairs with adenine in DNA.

DNA base pairing follows a pattern that keeps the double helix width uniform: a purine pairs with a pyrimidine. Adenine forms two hydrogen bonds specifically with thymine, so in DNA the complementary partner for adenine is thymine. This pairing is distinct from cytosine–guanine, which pair with each other, and from uracil, which is used with adenine in RNA rather than in DNA. So thymine is the base that pairs with adenine in DNA.

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