Understanding Adenine (A) in DNA: A Key Building Block
The A in DNA stands for Adenine.
Adenine is one of the four nitrogenous bases that make up DNA, along with guanine (G), cytosine (C), and thymine (T). These bases pair up in a specific way: adenine always pairs with thymine (A-T), and guanine always pairs with cytosine (G-C).