Question 1

The key enzyme in regulation of glycogen degradation is

Accepted Answer

A)  glycogen phosphatase. 
B)  glycogen phosphorylase. 
C)  glucose 1-phosphate synthase. 
D)  glycogen kinase. 
E)  None of the answers is correct. 
A)  glycogen phosphatase. 
B)  glycogen phosphorylase. 
C)  glucose 1-phosphate synthase. 
D)  glycogen kinase. 
E)  None of the answers is correct.

Question 2

What are the fates of the glucose-1-phosphate derived from glycogen?

Accepted Answer

It is 1) converted into glucose-6-phosph

Question 3

Why can't the glucose 1-phosphate diffuse out of the cell?

Accepted Answer

There is no membrane transport

Question 4

What protein serves as the primer for glycogen synthase?

Accepted Answer

A)  branching enzyme 
B)  debranching enzyme 
C)  glycogenin 
D)  calmodulin 
E)  None of the answers is correct. 
A)  branching enzyme 
B)  debranching enzyme 
C)  glycogenin 
D)  calmodulin 
E)  None of the answers is correct.

Question 5

Why is glycogen branching important?

Accepted Answer

A)  Branching significantly alters the melting point. 
B)  Branching decreases the solubility of glycogen. 
C)  Branching increases the rates of glycogen synthesis and degradation by increasing the potential sites of action. 
D)  Branching allows glycogen to be transported to other areas of the cell. 
E)  None of the answers is correct. 
A)  Branching significantly alters the melting point. 
B)  Branching decreases the solubility of glycogen. 
C)  Branching increases the rates of glycogen synthesis and degradation by increasing the potential sites of action. 
D)  Branching allows glycogen to be transported to other areas of the cell. 
E)  None of the answers is correct.

Question 6

Which of the following is a major site of glycogen storage?

Accepted Answer

A)  adipose tissue 
B)  liver 
C)  pancreas 
D)  kidney 
E)  All of the answers are correct. 
A)  adipose tissue 
B)  liver 
C)  pancreas 
D)  kidney 
E)  All of the answers are correct.

Question 7

Draw a structure showing the most common linkage between glucose units found in glycogen.

Accepted Answer

The structure should include t

Question 8

What molecule must be excluded from the active site of glycogen phosphorylase?

Accepted Answer

A)  glucose 
B)  glucose 1-phosphate 
C)  water 
D)  phosphate 
E)  None of the answers is correct. 
A)  glucose 
B)  glucose 1-phosphate 
C)  water 
D)  phosphate 
E)  None of the answers is correct.

Question 9

How does insulin stimulate glycogen synthesis?

Accepted Answer

Insulin triggers a pathway that activate

Question 10

Phosphorylase requires the coenzyme ______________________ for activity.

Accepted Answer

The answer of Phosphorylase requires the coenzyme ______________________ for activity....

Exam 21: Glycogen Metabolism

The key enzyme in regulation of glycogen degradation is

What are the fates of the glucose-1-phosphate derived from glycogen?

Why can't the glucose 1-phosphate diffuse out of the cell?

What protein serves as the primer for glycogen synthase?

Why is glycogen branching important?

Which of the following is a major site of glycogen storage?

Draw a structure showing the most common linkage between glucose units found in glycogen.

What molecule must be excluded from the active site of glycogen phosphorylase?

How does insulin stimulate glycogen synthesis?

Phosphorylase requires the coenzyme ______________________ for activity.

Biochemistry: an Evolving Science

Protein Composition and Structure

Exploring Proteins and Proteomes

DNA, RNA, and the Flow of Genetic Information

Exploring Genes and Genomes

Exploring Evolution and Bioinformatics

Hemoglobin: a Portrait of a Protein in Action

Enzymes: Basic Concepts and Kinetics

Oxidative Phosphorylation

Catalytic Strategies

Regulatory Strategies

Carbohydrates

Lipids and Cell Membranes

Membrane Channels and Pumps

Signal-Transduction Pathways

Metabolism: Basic Concepts and Design

Glycolysis and Gluconeogenesis

The Citric Acid Cycle

The Light Reactions of Photosynthesis

The Calvin Cycle and the Pentose Phosphate Pathway

Fatty Acid Metabolism

Protein Turnover and Amino Acid Catabolism

The Biosynthesis of Amino Acids

Nucleotide Biosynthesis

Biosynthesis of Membrane Lipids and Steroids

The Integration of Metabolism

DNA Replication, Repair, and Recombination

Rna Synthesis and Processing

Protein Synthesis

The Control of Gene Expression in Prokaryotes

The Control of Gene Expression in Eukaryotes

Sensory Systems

The Immune System

Molecular Motors

Drug Development

Filters