What is DNA Made Of?

DNA is made up of molecules called “nucleotides.” Nucleotides contain a sugar group, phosphate group, and a nitrogen base. There are (4) types of nitrogen bases: 1. Thymine 2. Guanine 3. Cytosine 4. Adenine These bases, and the order in which they are formed, are what generate a genetic code, also known as, “DNA Instructions.”