purines vs pyrimidines structure and which bases belonig to which
Two rings vs one ring
AG=pure, CUT=pyrimidnes
base vs nucleoside vs nucleotide
just base name
base + sugar=adenosine, cytodine
Bae+sugar+1-3 Phosphates
-CMP, CDP. CTP
Thymine vs all other bases
Thymine is made seperately/