
Concept explainers
(a)
Interpretation:
Base and monosaccharide used to form a given nucleoside needs to be identified and the name of the nucleoside needs to be stated.
Concept Introduction:
DNA and RNA are
A
Only the base and the sugar portion of a nucleotide is called a nucleoside.
Bases in DNA/RNA:
There are only five common nitrogen-containing bases are present in DNA/RNA, which are derived either from pyrimidine or purine.
Sugar in DNA/RNA:
The monosaccharide in RNA is D-ribose.
In DNA, the monosaccharide is D-2-deoxyribose (lacks a hydroxylgroup at C2).
Naming Nucleosides:
The suffix −idine is used to name a nucleoside derived from a pyrimidine base.
The suffix -osine is used to name a nucleoside derived from a purine base.
The prefix deoxy- is used if hydroxyl group is missing at C-2 position of the sugar.
(b)
Interpretation:
Base and monosaccharide used to form a given nucleosideneed to be identified and the name of the nucleoside needs to be stated.
Concept Introduction:
DNA and RNA are linear
A nucleotide has three components; a five-membered sugar ring (monosaccharide), a nitrogen-containing base, and a phosphate group.
Only the base and the sugar portion of a nucleotide is called a nucleoside.
Bases in DNA/RNA:
There are only five common nitrogen-containing bases are present in DNA/RNA, which are derived either from pyrimidine or purine.
Sugar in DNA/RNA:
The monosaccharide in RNA is D-ribose.
In DNA, the monosaccharide is D-2-deoxyribose (lacks a hydroxyl group at C2).
Naming Nucleosides:
The suffix −idine is used to name a nucleoside derived from a pyrimidine base.
The suffix -osine is used to name a nucleoside derived from a purine base.
The prefix deoxy- is used if hydroxyl group is missing at C-2 position of the sugar.

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Chapter 22 Solutions
Connect One Semester Access Card for General, Organic, & Biological Chemistry
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