Memotiva AP Biology Unit 1 Topic 1.6: Nucleic Acids — DNA, RNA, Nucleotide Structure and the Double Helix

What are the base pairing rules in DNA?

AP Biology Unit 1 Topic 1.6: Nucleic Acids — DNA, RNA, Nucleotide Structure and the Double Helix

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Nortren·April 11, 2026

What are the base pairing rules in DNA?

0:15

In DNA, adenine always pairs with thymine through two hydrogen bonds, and guanine always pairs with cytosine through three hydrogen bonds. This complementary base pairing is the foundation of DNA replication and transcription, ensuring accurate copying and reading of genetic information.