base
base A unit of DNA. There are four bases in DNA: adenine (A), guanine (G), thymine (T), and cytosine (C). The sequence of bases (for example, CAG) constitutes the genetic code.
base A unit of DNA. There are four bases in DNA: adenine (A), guanine (G), thymine (T), and cytosine (C). The sequence of bases (for example, CAG) constitutes the genetic code.