In RNA, adenine always pairs with which base?

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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 RNA, adenine always pairs with which base?

Explanation:
Adenine pairs with uracil in RNA. This pairing happens because uracil provides the complementary hydrogen-bonding pattern to adenine, giving two hydrogen bonds that stabilize the A–U interaction just as adenine pairs with thymine in DNA. In RNA, thymine isn’t present; instead, uracil takes its place. Cytosine pairs with guanine, so those bases don’t pair with adenine in standard RNA structure.

Adenine pairs with uracil in RNA. This pairing happens because uracil provides the complementary hydrogen-bonding pattern to adenine, giving two hydrogen bonds that stabilize the A–U interaction just as adenine pairs with thymine in DNA. In RNA, thymine isn’t present; instead, uracil takes its place. Cytosine pairs with guanine, so those bases don’t pair with adenine in standard RNA structure.

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