Which nitrogenous base is found only in RNA?

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Multiple Choice

Which nitrogenous base is found only in RNA?

Explanation:
RNA uses uracil in place of thymine, so uracil is the base found only in RNA. Adenine and cytosine appear in both RNA and DNA, while thymine is specific to DNA. This distinction is what distinguishes RNA from DNA. In base pairing, uracil pairs with adenine in RNA, whereas thymine pairs with adenine in DNA.

RNA uses uracil in place of thymine, so uracil is the base found only in RNA. Adenine and cytosine appear in both RNA and DNA, while thymine is specific to DNA. This distinction is what distinguishes RNA from DNA. In base pairing, uracil pairs with adenine in RNA, whereas thymine pairs with adenine in DNA.

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