In DNA base pairing, which base pairs with thymine?

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Multiple Choice

In DNA base pairing, which base pairs with thymine?

Explanation:
In DNA base pairing, thymine pairs with adenine. This pairing is guided by complementarity: thymine is a pyrimidine and adenine is a purine, and together they form two hydrogen bonds that fit the width of the DNA double helix. This A–T pairing helps stabilize the DNA structure while allowing the strands to separate during replication and transcription. Cytosine pairs with guanine instead, forming three hydrogen bonds, which is a different, equally important pairing. Uracil is used in RNA (instead of thymine) and pairs with adenine there, not in DNA.

In DNA base pairing, thymine pairs with adenine. This pairing is guided by complementarity: thymine is a pyrimidine and adenine is a purine, and together they form two hydrogen bonds that fit the width of the DNA double helix. This A–T pairing helps stabilize the DNA structure while allowing the strands to separate during replication and transcription. Cytosine pairs with guanine instead, forming three hydrogen bonds, which is a different, equally important pairing. Uracil is used in RNA (instead of thymine) and pairs with adenine there, not in DNA.

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