Question

By which of the following bonds, a nitrogenous base is linked to the pentose sugar?

• A. Phosphate bond
• B. Ester bond
• C. Peptide bond
• D. N-glycosidic bond

Answer 1

Answer:

D. N-glycosidic bond

A nitrogenous base is linked to the pentose sugar by an N-glycosidic bond. As a result of this linkage, a nucleoside is formed. Purine nucleosides have 1’-9 glycosidic linkage and pyrimidine nucleosides have 1’-1 linkage.