In RNA, thymine is replaced by uracil.

Understand the Problem

The question is asking for the nucleotide base that replaces thymine in RNA, which is a basic concept in molecular biology.

More Information

In RNA, uracil replaces thymine as one of the four nitrogenous bases. Uracil pairs with adenine through hydrogen bonds, similar to how thymine pairs with adenine in DNA.

Tips

Confusing uracil with adenine is a common mistake; remember that uracil pairs with adenine in RNA

Sources

• In RNA, thymine is replaced by - BYJU'S - byjus.com
• Why is thymine in DNA and uracil in RNA? - Quora - quora.com
• in RNA (bottom), thymine is replaced by uracil (yellow) - Nature - nature.com