The structure of guanosine needs to be drawn, the carbon in the sugar needs to be numbered and it should be classified as a ribonucleoside or a deoxyribonucleoside. Concept Introduction: DNA and RNA are linear polymers of nucleotides. 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 22.1, Problem 22.2P

Interpretation Introduction

Interpretation:

The structure of guanosine needs to be drawn, the carbon in the sugar needs to be numbered and it should be classified as a ribonucleoside or a deoxyribonucleoside.

Concept Introduction:

DNA and RNA are linear polymers of nucleotides.

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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