Question 1

____________ takes place instead of hydrolysis in glycogen breakdown.

Accepted Answer

A)  reducing
B)  ɑ-1,6-glycosidic
C)  phosphorylase kinase
D)  ɑ-1,4-glycoside
E)  nonreducingF) phosphorylase aG) glucose 6-phosphataseH) UTP-glucoseI) calmodulinJ) phosphorolysisK) epinephrineL) glucagon

Question 2

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

Accepted Answer

There is no membrane transport...

Question 3

The type of bond that is located at the branch points in glycogen is ____________.

Accepted Answer

A)  reducing
B)  ɑ-1,6-glycosidic
C)  phosphorylase kinase
D)  ɑ-1,4-glycoside
E)  nonreducingF) phosphorylase aG) glucose 6-phosphataseH) UTP-glucoseI) calmodulinJ) phosphorolysisK) epinephrineL) glucagon

Question 4

What is the function of liver glycogen degradation?

Accepted Answer

A)   to export glucose to other tissues when glucose levels are low
B)   to maintain glucose levels after a large meal
C)   to provide for the large energy needs of the liver
D)   All of the above.
E)   None of the above.

Question 5

The hormone ____________ signifies the starved state.

Accepted Answer

A)  reducing
B)  ɑ-1,6-glycosidic
C)  phosphorylase kinase
D)  ɑ-1,4-glycoside
E)  nonreducingF) phosphorylase aG) glucose 6-phosphataseH) UTP-glucoseI) calmodulinJ) phosphorolysisK) epinephrineL) glucagon

Question 6

What path, in addition to the cAMP-induced signal transduction, is used in the liver to stimulate glycogen breakdown by epinephrine?

Accepted Answer

In the liver, epinephrine also binds to ...

Question 7

Which liver enzyme is deficient in Hers disease?

Accepted Answer

A)   phosphorylase
B)   transferase
C)   glucosidase
D)   phosphoglucomutase
E)   None of the above.

Question 8

The hydrolysis catalyzed by α-1,6-glucosidase releases a(n) ______________ molecule.

Accepted Answer

The answer of The hydrolysis catalyzed by α-1,6-glucosidase releases a(n)...

Question 9

The major site(s)  of glycogen storage is (are) :

Accepted Answer

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

Question 10

One mechanism for turning off glycogen degradation involves the removal of a phosphate group from glycogen phorphorylase by the enzyme ____________.

Accepted Answer

protein ph...

Question 11

The process by which a bond is cleaved by the addition of orthophosphate is ____________.

Accepted Answer

A)  reducing
B)  ɑ-1,6-glycosidic
C)  phosphorylase kinase
D)  ɑ-1,4-glycoside
E)  nonreducingF) phosphorylase aG) glucose 6-phosphataseH) UTP-glucoseI) calmodulinJ) phosphorolysisK) epinephrineL) glucagon

Question 12

____________ is the liver enzyme that cleaves the phosphate from glucose 6-phosphate.

Accepted Answer

A)  reducing
B)  ɑ-1,6-glycosidic
C)  phosphorylase kinase
D)  ɑ-1,4-glycoside
E)  nonreducingF) phosphorylase aG) glucose 6-phosphataseH) UTP-glucoseI) calmodulinJ) phosphorolysisK) epinephrineL) glucagon

Question 13

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

Accepted Answer

The structure should...

Question 14

What are the two regulatory controls for phosphorylase kinase?

Accepted Answer

Phosphorylase kinase is activa...

Question 15

Why is the formation of glucose 1-phosphate advantageous?

Accepted Answer

It is advantageous because the...

Question 16

The ____________ enzyme catalyzes the phosphorylation of glycogen phosphorylase.

Accepted Answer

A)  reducing
B)  ɑ-1,6-glycosidic
C)  phosphorylase kinase
D)  ɑ-1,4-glycoside
E)  nonreducingF) phosphorylase aG) glucose 6-phosphataseH) UTP-glucoseI) calmodulinJ) phosphorolysisK) epinephrineL) glucagon

Question 17

The protein ____________ is the δ subunit of phosphorylase kinase.

Accepted Answer

A)  reducing
B)  ɑ-1,6-glycosidic
C)  phosphorylase kinase
D)  ɑ-1,4-glycoside
E)  nonreducingF) phosphorylase aG) glucose 6-phosphataseH) UTP-glucoseI) calmodulinJ) phosphorolysisK) epinephrineL) glucagon

Question 18

Why is the T state of glycogen phosphorylase less active?

Accepted Answer

A)   The adjacent amino acids are not phosphorylated; thus the catalysis cannot be carried out.
B)   The active site is partially blocked.
C)   ATP cannot be bound by the T state.
D)   All of the above.
E)   None of the above.

Question 19

____________: Most of the glucose residues in glycogen are linked by this type of bond.

Accepted Answer

A)  reducing
B)  ɑ-1,6-glycosidic
C)  phosphorylase kinase
D)  ɑ-1,4-glycoside
E)  nonreducingF) phosphorylase aG) glucose 6-phosphataseH) UTP-glucoseI) calmodulinJ) phosphorolysisK) epinephrineL) glucagon

Question 20

What physiological conditions render phosphorylase b less active?

Accepted Answer

A)   high ATP, high AMP, and glucose 6-phosphate levels
B)   high ATP and low calcium ion levels
C)   high ATP and high glucose 6-phosphate levels
D)   All of the above.
E)   None of the above.

Exam 24: Glycogen Degradation

Why is the formation of glucose 1-phosphate advantageous?

Correct AnswerverifiedIt is advantageous because the...View AnswerShow Answer

The protein ____________ is the δ subunit of phosphorylase kinase.

Correct AnswerverifiedShow Answer

____________: Most of the glucose residues in glycogen are linked by this type of bond.

Correct AnswerverifiedShow Answer

One mechanism for turning off glycogen degradation involves the removal of a phosphate group from glycogen phorphorylase by the enzyme ____________.

Correct Answerverifiedprotein ph...View AnswerShow Answer

What are the two regulatory controls for phosphorylase kinase?

Correct AnswerverifiedPhosphorylase kinase is activa...View AnswerShow Answer

The ____________ enzyme catalyzes the phosphorylation of glycogen phosphorylase.

Correct AnswerverifiedShow Answer

The process by which a bond is cleaved by the addition of orthophosphate is ____________.

Correct AnswerverifiedShow Answer

____________ is the liver enzyme that cleaves the phosphate from glucose 6-phosphate.

Correct AnswerverifiedShow Answer

Why is the T state of glycogen phosphorylase less active?

Correct AnswerverifiedShow Answer

What is the function of liver glycogen degradation?

Correct AnswerverifiedShow Answer

____________ takes place instead of hydrolysis in glycogen breakdown.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedThe structure should...View AnswerShow Answer

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

Correct AnswerverifiedThere is no membrane transport...View AnswerShow Answer

The hormone ____________ signifies the starved state.

Correct AnswerverifiedShow Answer

What path, in addition to the cAMP-induced signal transduction, is used in the liver to stimulate glycogen breakdown by epinephrine?

Correct AnswerverifiedIn the liver, epinephrine also binds to ...View AnswerShow Answer

Which liver enzyme is deficient in Hers disease?

Correct AnswerverifiedShow Answer

The type of bond that is located at the branch points in glycogen is ____________.

Correct AnswerverifiedShow Answer

What physiological conditions render phosphorylase b less active?

Correct AnswerverifiedShow Answer

The hydrolysis catalyzed by α-1,6-glucosidase releases a(n) ______________ molecule.

Correct AnswerverifiedShow Answer

The major site(s) of glycogen storage is (are) :

Correct AnswerverifiedShow Answer

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It is advantageous because the...
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protein ph...
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Phosphorylase kinase is activa...
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Correct Answer
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The structure should...
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There is no membrane transport...
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Correct Answer
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In the liver, epinephrine also binds to ...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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