Which nucleotide is unique to RNA and not used in DNA?

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Multiple Choice

Which nucleotide is unique to RNA and not used in DNA?

Explanation:
Uracil is the nucleotide unique to RNA. RNA uses ribose as its sugar and includes uracil as one of its bases, whereas DNA uses thymine instead of uracil. Adenine, cytosine, and guanine appear in both RNA and DNA, so they’re not unique to RNA, and the difference described by deoxyribose is a sugar difference rather than a base. Therefore, the base that is only found in RNA is uracil.

Uracil is the nucleotide unique to RNA. RNA uses ribose as its sugar and includes uracil as one of its bases, whereas DNA uses thymine instead of uracil. Adenine, cytosine, and guanine appear in both RNA and DNA, so they’re not unique to RNA, and the difference described by deoxyribose is a sugar difference rather than a base. Therefore, the base that is only found in RNA is uracil.

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