Which nitrogenous base pairs with thymine in DNA?

In DNA, thymine is one of the four nitrogenous bases and it specifically pairs with adenine. This complementary pairing occurs through hydrogen bonds, where thymine forms two hydrogen bonds with adenine. This base pairing is crucial for the stability of the DNA double helix structure and is essential during DNA replication and transcription processes.

The pairing of adenine with thymine allows the genetic information to be accurately copied and transmitted during cell division, maintaining the integrity of genetic code across generations. In contrast, the other bases listed do not match with thymine; cytosine pairs with guanine, while uracil is found in RNA and pairs with adenine instead of thymine in the nucleic acid structure. Thus, adenine's pairing with thymine in DNA is a foundational aspect of molecular biology.