In DNA, thymine forms 2 hydrogen bonds with _____.

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Multiple Choice

In DNA, thymine forms 2 hydrogen bonds with _____.

Explanation:
DNA base pairing relies on specific hydrogen bonds: adenine pairs with thymine using two hydrogen bonds, while guanine pairs with cytosine using three. In DNA, thymine thus forms two hydrogen bonds with adenine, helping keep the helix width uniform and contributing to DNA stability. Cytosine pairs with guanine, and uracil is used in RNA (where it pairs with adenine), not in DNA. So thymine’s partner in DNA is adenine.

DNA base pairing relies on specific hydrogen bonds: adenine pairs with thymine using two hydrogen bonds, while guanine pairs with cytosine using three. In DNA, thymine thus forms two hydrogen bonds with adenine, helping keep the helix width uniform and contributing to DNA stability. Cytosine pairs with guanine, and uracil is used in RNA (where it pairs with adenine), not in DNA. So thymine’s partner in DNA is adenine.

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