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Question 22.1: Identify the base and monosaccharide used to form the follow...

Identify the base and monosaccharide used to form the following nucleoside, and then name it.

Analysis

• The sugar portion of a nucleoside contains the five-membered ring. If there is an OH group at C2 ‘ , the sugar is ribose, and if there is no OH group at C2 ‘ , the sugar is deoxyribose.
• The base is joined to the five-membered ring as an N -glycoside. A pyrimidine base has one ring and is derived from either cytosine, uracil, or thymine. A purine base has two rings and is derived from either adenine or guanine.
• Nucleosides derived from pyrimidines end in the suffix – idine. Nucleosides derived from purines end in the suffix – osine.

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