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Polysaccharides: Structure and Derivatives

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Polysaccharides: Structure and Derivatives

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Questions and Answers

What type of bonds are present in starch molecules?

β-1,4 linkages

α-1,4 and α-1,6 linkages (correct)

α-1,4 and β-1,6 linkages

β-1,6 linkages

What is the main difference between gums and mucilages?

Gums are sulphuric acid esters, while mucilages are composed of Ca, K, and Mg salts

Gums are composed of Ca, K, and Mg salts, while mucilages are sulphuric acid esters (correct)

Gums are composed of polysaccharides, while mucilages are composed of polyuronides

Gums are composed of polyuronides, while mucilages are composed of polysaccharides

What is the result of hydrolyzing a polysaccharide?

A definite number of monosaccharides

Only glucose molecules

An indefinite number of monosaccharides (correct)

A mixture of sugars and uronic acids

What is the type of linkage present in cellulose molecules?

<p>β-1,4 linkages</p> Signup and view all the answers

What is the common name for the polysaccharide found in animals?

<p>Glycogen</p> Signup and view all the answers

Study Notes

Polysaccharides

Hydrolysis of polysaccharides produces an indefinite number of monosaccharide molecules called glycans.

Biologically Significant Polysaccharides

Starch: a common polysaccharide of biological significance
Glycogen (Animal starch): a common polysaccharide of biological significance
Cellulose: a common polysaccharide of biological significance
Inulin: a common polysaccharide of biological significance

Structure of Starch and Cellulose

Starch: glucose units joined by α-1,4 and α-1,6 linkages
Cellulose: glucose units joined by β-1,4 linkages

Derivatives of Polysaccharides

Gums: consist of Ca, K, and Mg salts of complex substances called polyuronides
Properties of Gums: on prolonged boiling with dilute acids, they yield sugar and uronic acids
Mucilages: sulphuric acid esters

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Description

This quiz covers the structure and derivatives of polysaccharides, including starch, glycogen, cellulose, and inulin. It also explores the properties of gums and mucilages.