Which nitrogenous base is present in DNA but replaced by a different base in RNA?

Macromolecules MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Macromoleculeschemistry-mcqs › macromolecules
Published
18 Mar 2019
Last updated
28 May 2026

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Explanation

Thymine is found in DNA, whereas RNA contains uracil instead. The other bases—cytosine, adenine, and guanine—are common to both DNA and RNA.

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