Question 1

Glycogen phosphorylase and glycogen synthase

Accepted Answer

A)  are not activated simultaneously 
B)  are activated simultaneously under special circumstances 
C)  can be activated simultaneously under any circumstances 
D)  are involved in catalysis of the same process 
A)  are not activated simultaneously 
B)  are activated simultaneously under special circumstances 
C)  can be activated simultaneously under any circumstances 
D)  are involved in catalysis of the same process

Question 2

Which of the following mechanisms can be used to regulate metabolic pathways?

Accepted Answer

A)  Allosteric activators and inhibitors. 
B)  Covalent modifications of enzymes. 
C)  Use of separate enzymes at a given point in the forward and backward pathways. 
D)  Regulation of the genes for the enzymes used in the pathway. 
E)  All of these are used to regulate metabolism. 
A)  Allosteric activators and inhibitors. 
B)  Covalent modifications of enzymes. 
C)  Use of separate enzymes at a given point in the forward and backward pathways. 
D)  Regulation of the genes for the enzymes used in the pathway. 
E)  All of these are used to regulate metabolism.

Question 3

When glycogen synthase is phosphorylated

Accepted Answer

A)  its activity decreases. 
B)  its activity increases. 
C)  its activity is unaffected. 
D)  none of these because that enzyme doesn't get phosphorylated. 
A)  its activity decreases. 
B)  its activity increases. 
C)  its activity is unaffected. 
D)  none of these because that enzyme doesn't get phosphorylated.

Question 4

Glycogen is mainly found in

Accepted Answer

A)  liver and muscle. 
B)  liver and brain. 
C)  muscle and brain. 
D)  liver, muscle, and brain. 
E)  adipose tissue 
A)  liver and muscle. 
B)  liver and brain. 
C)  muscle and brain. 
D)  liver, muscle, and brain. 
E)  adipose tissue

Question 5

​ Explain the advantage of a branched-chain structure of glycogen over a linear polymer.

Accepted Answer

The highly branched structure of glycoge

Question 6

Which nucleotide triphosphate is hydrolyzed in the conversion of oxaloacetate to phosphoenolpyruvate?

Accepted Answer

A)  ATP 
B)  GTP 
C)  CTP 
D)  UTP 
E)  No nucleotide triphosphate is hydrolysed. 
A)  ATP 
B)  GTP 
C)  CTP 
D)  UTP 
E)  No nucleotide triphosphate is hydrolysed.

Question 7

Which of the following is true?

Accepted Answer

A)  Gluconeogenesis from pyruvate involves simple reversal of all of the glycolysis reactions, except for the reactions that consumed ATP during catabolism. 
B)  Anabolic reactions are usually the reversal of catabolic ones 
C)  In gluconeogenesis, the effective reversal of the glycolytic reactions of hexokinase and phosphofructokinase involve the same sugar molecules but not the exact set of substrates and products 
D)  all of these are true 
A)  Gluconeogenesis from pyruvate involves simple reversal of all of the glycolysis reactions, except for the reactions that consumed ATP during catabolism. 
B)  Anabolic reactions are usually the reversal of catabolic ones 
C)  In gluconeogenesis, the effective reversal of the glycolytic reactions of hexokinase and phosphofructokinase involve the same sugar molecules but not the exact set of substrates and products 
D)  all of these are true

Glycogen phosphorylase and glycogen synthase

Which of the following mechanisms can be used to regulate metabolic pathways?

When glycogen synthase is phosphorylated

Glycogen is mainly found in

Explain the advantage of a branched-chain structure of glycogen over a linear polymer.

Which nucleotide triphosphate is hydrolyzed in the conversion of oxaloacetate to phosphoenolpyruvate?

Which of the following is true?

Biochemistry and the Organization of Cells

Water the Solvent for Biochemical Reactions

Amino Acids and Peptides

The Three Dimensional Structure of Proteins

Protein Purification and Characterization Techniques

The Behavior of Proteins Enzymes

The Behavior of Proteins Enzymes Mechanisms and Control

Lipids and Proteins Are Associated in Biological Membranes

Nucleic Acids How Structure Conveys Information

Biosynthesis of Nucleic Acids Replication

Transcription of the Genetic Code the Biosynthesis of Rna

Protein Synthesis Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses Cancer and Immunology

The Importance of Energy Changes and Electron Transfer in Metabolism

Carbohydrates

Glycolysis

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Lipid Metabolism

Photosynthesis

The Metabolism of Nitrogen

Integration of Metabolism Cellular Signaling

Filters

Exam 18: Storage Mechanisms and Control in Carbohydrate Metabolism

Glycogen phosphorylase and glycogen synthase

Which of the following mechanisms can be used to regulate metabolic pathways?

When glycogen synthase is phosphorylated

Glycogen is mainly found in

​ Explain the advantage of a branched-chain structure of glycogen over a linear polymer.

Which nucleotide triphosphate is hydrolyzed in the conversion of oxaloacetate to phosphoenolpyruvate?

Which of the following is true?

Biochemistry and the Organization of Cells

Water the Solvent for Biochemical Reactions

Amino Acids and Peptides

The Three Dimensional Structure of Proteins

Protein Purification and Characterization Techniques

The Behavior of Proteins Enzymes

The Behavior of Proteins Enzymes Mechanisms and Control

Lipids and Proteins Are Associated in Biological Membranes

Nucleic Acids How Structure Conveys Information

Biosynthesis of Nucleic Acids Replication

Transcription of the Genetic Code the Biosynthesis of Rna

Protein Synthesis Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses Cancer and Immunology

The Importance of Energy Changes and Electron Transfer in Metabolism

Carbohydrates

Glycolysis

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Lipid Metabolism

Photosynthesis

The Metabolism of Nitrogen

Integration of Metabolism Cellular Signaling

Filters

Explain the advantage of a branched-chain structure of glycogen over a linear polymer.