Uracil replaces thymine in which nucleic acid?

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Multiple Choice

Uracil replaces thymine in which nucleic acid?

Explanation:
Uracil replaces thymine in RNA. RNA contains adenine, guanine, cytosine, and uracil, while DNA uses thymine instead of uracil. This difference aligns with RNA’s structure and role (ribose sugar and typically single-stranded) and with thymine’s greater chemical stability (thymine is basically methylated uracil) that suits DNA’s role in long-term genetic storage. Proteins and carbohydrates are not nucleic acids, so they don’t contain these bases.

Uracil replaces thymine in RNA. RNA contains adenine, guanine, cytosine, and uracil, while DNA uses thymine instead of uracil. This difference aligns with RNA’s structure and role (ribose sugar and typically single-stranded) and with thymine’s greater chemical stability (thymine is basically methylated uracil) that suits DNA’s role in long-term genetic storage. Proteins and carbohydrates are not nucleic acids, so they don’t contain these bases.

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