Question

Nucleoside is a nucleotide without

• A. Sugar
• B. Nitrogen base
• C. Hydrogen bond
• D. Phosphate group

Answer 1

The correct option is D Phosphate group

• A nucleotide consists of a nitrogenous base, a sugar (ribose or deoxyribose) and one to three phosphate groups.
• A nucleoside consists of a nitrogenous base covalently attached to a sugar (ribose or deoxyribose) but without the phosphate group.
• Examples of nucleosides include cytidine, uridine, adenosine, guanosine, thymidine, and inosine.

(1) Nucleoside = Sugar + Base

(2) Nucleotide = Sugar + Base + Phosphate

So, the answer is D.