Nucleotides are formed by

Step-by-step solution

The nucleotide is formed by the union of a phosphate group with a nucleoside. A nucleoside infact contains a sugar molecule alongwith an organic nitrogenous base. Thus, a nucleotide contains an organic nitrogenous base (purine or pyrimidine) alongwith a sugar molecule and a phosphate group, i.e., Nucleoside = Sugar molecule + organic nitrogenous base.