Connect 1-Semester Online Access for Principles of General, Organic & Biochemistry
Connect 1-Semester Online Access for Principles of General, Organic & Biochemistry
2nd Edition
ISBN: 9780077633707
Author: Janice Smith
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 14, Problem 14.30UKC

(a)

Interpretation Introduction

Interpretation:

Glycosidic linkage has to be located in given disaccharide.

Connect 1-Semester Online Access for Principles of General, Organic & Biochemistry, Chapter 14, Problem 14.30UKC , additional homework tip  1

Concept Introduction:

Carbohydrates that are composed of two monosaccharide units are known as disaccharides.  This is formed when one hydroxyl group of one monosaccharide reacts with a hydroxyl group of another monosaccharide.  The bond formed between the two monosaccharide units is CO bond and this linkage is known as glycosidic linkage.  Carbon atom that is present in the glycosidic linkage is bonded to two oxygen atoms.

Depending on the orientation of the glycosidic linkage, the glycoside bond can be of two types.  They are α-glycoside and β-glycoside.  In α-glycoside, the bond is oriented down from the carbon C1 while in β-glycoside, the bond is oriented up from the carbon C1.

(b)

Interpretation Introduction

Interpretation:

The carbon atoms has to be numbered in both rings of given disaccharide.

Connect 1-Semester Online Access for Principles of General, Organic & Biochemistry, Chapter 14, Problem 14.30UKC , additional homework tip  2

(c)

Interpretation Introduction

Interpretation:

Glycosidic linkage has to be classified as α or β in given disaccharide.

Connect 1-Semester Online Access for Principles of General, Organic & Biochemistry, Chapter 14, Problem 14.30UKC , additional homework tip  3

Concept Introduction:

Refer part (a).

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(A) Identify the glycosidic bond in the following disaccharide (B) Decide whether the compound is a non reducing or reducing sugar (C) Polysaccharide units are usually bonded together with alpha or beta 1,6 or 1,4 linkages. What linkage is used in the disaccharide shown below?
(a) Draw the condensed structural formula, and give the name for the dipeptide Pro-Asn. (b) Draw the disaccharide formed by the following two monosaccharide via 1,4-linkage. In your disaccharide structure, circle and label the anomeric carbon and indicate whether you have an alpha (a) or a beta (B) anomer. CH2OH CH₂OH ОН ОН ОН ОН, ОН ОН ОН ОН
Consider N-acetyl-d-glucosamine Q.) Draw a chair conformation for the disaccharide formed by joining two units of the pyranose form of N-acetyl-d-glucosamine by a b-1,4-glycosidic bond. If you draw this correctly, you have the structural formula for the repeating dimer of chitin, the structural polysaccharide component of the shell of lobsters and other crustaceans.

Chapter 14 Solutions

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