Which base is found in RNA but not in DNA?

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Multiple Choice

Which base is found in RNA but not in DNA?

Explanation:
RNA uses uracil instead of thymine, so uracil is present in RNA but not in DNA. In RNA the bases are adenine, uracil, cytosine, and guanine, whereas DNA contains adenine, thymine, cytosine, and guanine. During transcription, adenine pairs with uracil in RNA just as it pairs with thymine in DNA. The methyl group on thymine (which RNA lacks) helps stabilize DNA for long-term storage, a chemical difference that underlies why thymine is used in DNA and uracil is used in RNA.

RNA uses uracil instead of thymine, so uracil is present in RNA but not in DNA. In RNA the bases are adenine, uracil, cytosine, and guanine, whereas DNA contains adenine, thymine, cytosine, and guanine. During transcription, adenine pairs with uracil in RNA just as it pairs with thymine in DNA. The methyl group on thymine (which RNA lacks) helps stabilize DNA for long-term storage, a chemical difference that underlies why thymine is used in DNA and uracil is used in RNA.

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