Which pyrimidine base is present in both DNA and RNA?

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Study for the Biochemistry Module 6 Exam. Practice with multiple-choice questions and detailed explanations. Master your biochemistry knowledge with structured revisions and personalized feedback. Prepare to excel!

Multiple Choice

Which pyrimidine base is present in both DNA and RNA?

Explanation:
Pyrimidines are single-ring bases, and the one that appears in both DNA and RNA is cytosine. Uracil is used in RNA in place of thymine, which is the pyrimidine found in DNA. Adenine is a purine, not a pyrimidine. So cytosine is the base shared by both DNA and RNA.

Pyrimidines are single-ring bases, and the one that appears in both DNA and RNA is cytosine. Uracil is used in RNA in place of thymine, which is the pyrimidine found in DNA. Adenine is a purine, not a pyrimidine. So cytosine is the base shared by both DNA and RNA.

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