What are the two purines found in DNA?

In DNA, purines are a specific type of nitrogenous base characterized by a double-ring structure. There are two purines present in DNA: adenine and guanine. These bases play a crucial role in the formation of the genetic code, as they pair with pyrimidines—specifically, adenine pairs with thymine, and guanine pairs with cytosine through hydrogen bonds.

Understanding the structure and classification of these bases is fundamental in genetics, as the pairing rules are essential for DNA replication and transcription processes. The distinctions between purines and pyrimidines underline the complementary nature of DNA strands, contributing to its stability and function. Therefore, identifying adenine and guanine as the two purines in DNA is key to grasping how genetic information is stored and transmitted.