We want to zoom in and consider dna on the molecular level. a nucleotide is composed of 1 phosphate, 1 base, and 1 sugar. -sugar (deoxyribose) -phosphate group - nitrogenous base (four types adenine, cytosine, guanine, and thymine) your challenge is to determine how these parts go together when doing dna replication to make up the dna structure. rules for this challenge. 1. dna is made up of nucleotides, each nucleotide is made of some combination of 1 phosphate, 1base, and 1 sugar 2. phosphate can only bond with a sugar. 3. sugar can only bond with a phosphate or a base. 4. a single base can only pair with another base or a sugar. type what you have come up with below.