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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
Publisher: Cengage Learning
ISBN: 9781305389892
BuyFind

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
Publisher: Cengage Learning
ISBN: 9781305389892

Solutions

Chapter
Section
Chapter 3, Problem 4TYK
Textbook Problem
548 views

Maltose, sucrose, and lactose differ from one another:

a. because not all contain glucose.

b. because not all of them exist in ring form.

c. in the number of carbons in the sugar.

d. in the number of hexose monomers involved.

e. by the linkage of the monomers.

Expert Solution
Summary Introduction

Introduction:

Carbohydrates are biomolecules that are polymers of monosaccharides. Monosaccharides are simple sugars that cannot be broken down further. Chemically, monosaccharides are polyhydroxyaldehydes and ketones. These are composed of a carbon chain with a length of three to seven carbon atoms. These occur in a ring as well as a chain form. The most common of these is a six-carbon sugar called hexoses.

Explanation of Solution

Justification for the correct answer:

Option (e) states that maltose, sucrose, and lactose differ from each other by the linkage of monomers. This is because in sucrose, glucose and fructose are monomers joined at carbon 1 and carbon 2, respectively; in lactose, glucose and galactose are monomers joined at carbon 1 and carbon 4, respectively; and in maltose, two glucose units are monomers joined at carbon 1 and carbon 4, respectively. Hence, option (e) is correct.

Justification for the incorrect answers:

Option (a) states that maltose, sucrose, and lactose differ from each other as all of these do not contain glucose. All these compounds contain glucose. So, it is an incorrect option...

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