So what types of nucleic acids do we have inside our body? So we have two types. We have deoxyribonucleic acids or DNA molecules and we have ribonucleic acids or RNA molecules. And these two molecules essentially are linear polymers of these subunits we call nucleotides. And a nucleotide consists of three components. So we have a nitrogenous base, we have a sugar molecule and we have a phosphate group.