Adenine pairs with which bases in RNA and DNA, respectively?

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Multiple Choice

Adenine pairs with which bases in RNA and DNA, respectively?

Explanation:
Base pairing rules vary between RNA and DNA. Adenine forms two hydrogen bonds with thymine in DNA and with uracil in RNA. Since RNA uses uracil instead of thymine, adenine pairs with uracil in RNA, while in DNA it pairs with thymine. So the correct pairing is adenine–uracil in RNA and adenine–thymine in DNA. (Cytosine pairs with guanine in both molecules.)

Base pairing rules vary between RNA and DNA. Adenine forms two hydrogen bonds with thymine in DNA and with uracil in RNA. Since RNA uses uracil instead of thymine, adenine pairs with uracil in RNA, while in DNA it pairs with thymine. So the correct pairing is adenine–uracil in RNA and adenine–thymine in DNA. (Cytosine pairs with guanine in both molecules.)

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