Which base is found in RNA but not in DNA?

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Prepare for your College Biology Exam 1 with flashcards and multiple choice questions. Test your understanding with detailed explanations and hints to ensure success in your biology exam!

Multiple Choice

Which base is found in RNA but not in DNA?

Explanation:
RNA uses uracil instead of thymine, so this base is present in RNA but not in DNA. Adenine, guanine, and cytosine appear in both DNA and RNA, while thymine is found only in DNA. Uracil is a pyrimidine like cytosine, but it lacks the methyl group that thymine has, which helps distinguish RNA from DNA.

RNA uses uracil instead of thymine, so this base is present in RNA but not in DNA. Adenine, guanine, and cytosine appear in both DNA and RNA, while thymine is found only in DNA. Uracil is a pyrimidine like cytosine, but it lacks the methyl group that thymine has, which helps distinguish RNA from DNA.

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