In RNA, which base replaces Thymine?

Study for the DNA Structure, Replication, Transcription and Translation Test with flashcards and multiple choice questions. Each question offers hints and explanations. Prepare thoroughly and excel in your exam!

Multiple Choice

In RNA, which base replaces Thymine?

Explanation:
RNA uses uracil in place of thymine. Uracil is chemically similar to thymine but lacks the methyl group, which fits RNA’s ribose sugar and the enzymes that synthesize RNA. In RNA, adenine pairs with uracil (instead of adenine pairing with thymine in DNA), while cytosine pairs with guanine. So the base that replaces thymine in RNA is uracil.

RNA uses uracil in place of thymine. Uracil is chemically similar to thymine but lacks the methyl group, which fits RNA’s ribose sugar and the enzymes that synthesize RNA. In RNA, adenine pairs with uracil (instead of adenine pairing with thymine in DNA), while cytosine pairs with guanine. So the base that replaces thymine in RNA is uracil.

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