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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 9TYK
Textbook Problem
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In living systems:

a. proteins rarely combine with other macromolecules.

b. enzymes are always proteins.

c. proteins are composed of 24 amino acids.

d. chaperonins inhibit protein movement.

e. a protein domain refers to the place in the cell where proteins are synthesized and function.

Expert Solution
Summary Introduction

Introduction:

The amino acids are the building blocks of proteins. These are linked to each other by peptide bonds and the sequence thus formed is also known as a polypeptide. Proteins serve various functions such as maintaining the structure in the form of muscles, catalyze biochemical reactions in the form of enzymes, and allows proper folding biomolecules in the form of chaperonins.

Explanation of Solution

Justification for the correct answer:

Option (b) is given that in living systems, enzymes are proteins. The enzymes are biocatalysts that increase the reaction rate of the biochemical reaction by lowering down the activation energy. The enzymes in a living system are generally proteinaceous in nature. Hence, option (b) is correct.

Justification for the incorrect answers:

Option (a) is given that in living systems, proteins rarely combine with other biomolecules. This is false as proteins link with the lipids and carbohydrates to form lipoproteins and glycoproteins, respectively. So, it is an incorrect option.

Option (c) is given that in living systems, proteins are composed of 24 amino acids...

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