DNA contains which bases?

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Prepare for the ECPI Anatomy and Physiology Exam. Study with flashcards and multiple choice questions, each with hints and explanations. Ensure your success in the exam!

Multiple Choice

DNA contains which bases?

Explanation:
DNA is built from four nitrogenous bases: adenine, thymine, cytosine, and guanine. In the DNA double helix, adenine pairs with thymine and cytosine pairs with guanine, stabilized by hydrogen bonds. Thymine is specific to DNA; RNA uses uracil instead of thymine. So the set that includes adenine, thymine, cytosine, and guanine correctly describes DNA bases. Options that replace thymine with uracil or omit thymine describe RNA bases instead, which is why they aren’t correct.

DNA is built from four nitrogenous bases: adenine, thymine, cytosine, and guanine. In the DNA double helix, adenine pairs with thymine and cytosine pairs with guanine, stabilized by hydrogen bonds. Thymine is specific to DNA; RNA uses uracil instead of thymine. So the set that includes adenine, thymine, cytosine, and guanine correctly describes DNA bases. Options that replace thymine with uracil or omit thymine describe RNA bases instead, which is why they aren’t correct.

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