Which base listed is not a DNA base?

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Test your knowledge with the Campbell Biology Concepts and Connections Quiz. Study with flashcards and multiple choice questions, each question has hints and explanations. Prepare effectively for your biology concepts exam!

Multiple Choice

Which base listed is not a DNA base?

Explanation:
The main idea is that DNA and RNA use different bases. DNA contains adenine, thymine, cytosine, and guanine, while RNA contains adenine, uracil, cytosine, and guanine. Uracil is the base that belongs to RNA, not DNA, because DNA uses thymine instead of uracil. The methyl group in thymine helps DNA distinguish true thymine from uracil that can arise from damage, contributing to DNA stability. So uracil is not a DNA base.

The main idea is that DNA and RNA use different bases. DNA contains adenine, thymine, cytosine, and guanine, while RNA contains adenine, uracil, cytosine, and guanine. Uracil is the base that belongs to RNA, not DNA, because DNA uses thymine instead of uracil. The methyl group in thymine helps DNA distinguish true thymine from uracil that can arise from damage, contributing to DNA stability. So uracil is not a DNA base.

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