So, in the same way that proteins consist of individual units known as amino acids, DNA molecules are also polymers, meaning they consist of individual subunits known as nucleotides. And any given nucleotide consists of three parts. So we have a deoxyribo sugar, which is a five member sugar. We have a nitrogenous base and we also have our phosphate group. Now, what exactly is the structure or arrangement of these three different types of sections or groups within our nucleotide? So this is one example of a nucleotide.