๐Ÿงฌap biology review

Uracil (U)

Written by the Fiveable Content Team โ€ข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโ€ขWritten by the Fiveable Content Team โ€ข Last updated September 2025

Definition

Uracil is a nitrogenous base found only in RNA. It replaces thymine from DNA and pairs with adenine during transcription.

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