Which nitrogen base pairs with Adenine in DNA?

In the structure of DNA, adenine pairs specifically with thymine through hydrogen bonding. This pairing is essential for the double-helix configuration of DNA, as it ensures that the two strands of DNA are complementary to each other. The base pairing rules, also known as Chargaff's rules, dictate that adenine (a purine) always pairs with thymine (a pyrimidine), maintaining a consistent distance between the sugar-phosphate backbones, which is critical for the stability and integrity of the DNA structure. Therefore, thymine is the correct nitrogen base that pairs with adenine in DNA.