What are the bases found in DNA?

In DNA, the bases present are adenine, thymine, cytosine, and guanine. These four nitrogenous bases are fundamental to the structure of DNA, where they pair specifically: adenine pairs with thymine, and cytosine pairs with guanine, forming the rungs of the double helix structure. This pairing is essential for DNA replication and function, as it ensures accurate copying during cell division.

Uracil, mentioned in some of the other selections, is actually a base found in RNA, where it takes the place of thymine. Understanding the distinction between DNA and RNA is crucial, as it highlights the differences in their structures and functions – with DNA being the genetic blueprint of life, and RNA playing key roles in protein synthesis and gene expression.