The figure below shows part of the primary structure of DNA. Identify the nucleoside.
A) A
B) B
C) C
D) D

Question

The figure below shows part of the primary structure of DNA. Identify the nucleoside. 
A) A 
B) B 
C) C 
D) D

Quizplus · Accepted Answer

The nucleoside is composed of a nitrogenous base (either adenine, guanine, cytosine or thymine) and a pentose sugar (either ribose or deoxyribose). In this case, the nitrogenous base is cytosine and the pentose sugar is deoxyribose, which is found in DNA (not RNA). Therefore, the correct choice is C.

The Figure Below Shows Part of the Primary Structure of DNA