Which of the following bases is found in RNA but not in DNA?

Prepare for the VCE Biology Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

In RNA, uracil serves as one of the four primary nitrogenous bases. Unlike DNA, which contains thymine, RNA substitutes uracil for thymine. This substitution is significant in the context of the molecular structure and function of nucleic acids. RNA is typically single-stranded and its use of uracil corresponds with the different roles and processes it undertakes in the cell, such as protein synthesis and gene expression. This distinction marks uracil as a key component that is unique to RNA, further illustrating the variations between these two essential biomolecules.

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