Which base pairs with Adenine in DNA?

In DNA, adenine pairs specifically with thymine through the formation of hydrogen bonds. This pairing is part of the base pairing rules that govern the structure of DNA. Adenine is a purine, which means it has a double-ring structure, while thymine is a pyrimidine with a single-ring structure. This complementary pairing between adenine and thymine is crucial for the stability and integrity of the DNA double helix.

The other options do not pair with adenine in the context of DNA. Guanine pairs with cytosine, while uracil is found in RNA and pairs with adenine in that context but not in DNA. Understanding the specific base pairing is essential for grasping the principles of genetics, such as replication and transcription, where the accuracy of these pairings ensures that genetic information is correctly copied and expressed.