Answer:
4
Explanation:
There are four different types of deoxyribonucleotides that make up DNA. They only differ in the type of nitrogenous base that is attached to the 2’ carbon of the pentose sugar ring. The four types of nitrogenous bases that differentiate the 4 types of nucleotides are; Adenine, Thiamine, Cytosine & Guanine.
