In DNA, which base pairs with Cytosine?

Study for the DNA Structure, Replication, Transcription and Translation Test with flashcards and multiple choice questions. Each question offers hints and explanations. Prepare thoroughly and excel in your exam!

Multiple Choice

In DNA, which base pairs with Cytosine?

Explanation:
Base pairing in DNA follows specific hydrogen-bonding rules: cytosine pairs with guanine. They form a pyrimidine-purine pair that links the two strands, with three hydrogen bonds between them, which helps stabilize the double helix and keeps the width uniform along the molecule. Chargaff’s rules also reflect this pairing, showing that guanine and cytosine quantities are balanced in the DNA molecule. Uracil appears in RNA and pairs with adenine there, while thymine pairs with adenine in DNA. So the base that pairs with cytosine is guanine.

Base pairing in DNA follows specific hydrogen-bonding rules: cytosine pairs with guanine. They form a pyrimidine-purine pair that links the two strands, with three hydrogen bonds between them, which helps stabilize the double helix and keeps the width uniform along the molecule. Chargaff’s rules also reflect this pairing, showing that guanine and cytosine quantities are balanced in the DNA molecule. Uracil appears in RNA and pairs with adenine there, while thymine pairs with adenine in DNA. So the base that pairs with cytosine is guanine.

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