BIOCHEM CHAPTER 8 EXAM
Both glycogenesis and glycogenolysis are controlled primarily by the interplay between
the two hormones insulin and ________.
A) Glycogen synthetase
B) Glucagon
C) Fructose kinase
D) Glucose hydrolyase
E) Pentose kinase - CORRECT ANSWER-B
Hexokinase D is found in the _______.
A) Kidney
B) Liver
C) Heart
D) Muscle
E) Intestine - CORRECT ANSWER-B
An enzyme family called the _________ catalyzes the phosphorylation of hexoses in
the body.
A) Hexolysases
B) Phosphorolysases
C) Hexokinases
D) Glucokinases
E) Phosphofructokinases - CORRECT ANSWER-C
The conversion of glucose-1-phosphate to UDP-glucose has a DG0' near zero. Which
of the following reactions is coupled with the above reaction to drive it to completion?
A) Hydrolysis of PPi
B) Hydrolysis of ATP
C) Hydrolysis of ADP
D) Hydrolysis of UDP
E) Hydrolysis of UTP - CORRECT ANSWER-A
Which of the following is required for the conversion of UDP-glucose to glycogen?
A) Glycogen synthase
B) Branching enzyme
C) Glucose phosphorlyase
D) Debranching enzyme
E) Both A and B are correct - CORRECT ANSWER-E
, A glycogen molecule that has been degraded to its branch points is called
A) Dextrin
B) Glucose
C) Amylose
D) Limit dextrin
E) Both A and B are correct - CORRECT ANSWER-D
Regulation of glycolysis involves all of the following except
A) Insulin
B) Glucagon
C) SREBP1c
D) AMPK
E) None of the above - CORRECT ANSWER-E
the binding of insulin to receptors on the surface of muscle cells stimulates which of the
following processes
A) Glycogenolysis
B) Glycogenesis
C) Release of ATP
D) Formation of cyclic AMP
E) Release of glucagon - CORRECT ANSWER-B
Under stressful conditions epinephrine is released from the adrenal medulla. The
release of epinephrine has which of the following effects on glucose metabolism?
A) Glycogenolysis is stimulated
B) Glycogenesis is inhibited
C) Adenylate cyclase is activated
D) Both A and B are correct
E) All of the above are correct - CORRECT ANSWER-E
Phosphorylase kinase
A) Converts inactive phosphorylase to active phosphorylase
B) Converts active phosphorylase to inactive phosphorylase
C) Phosphorylates glycogen synthase
D) Convets ADP to ATP
E) Both B and C are correct - CORRECT ANSWER-A
Cori's disease is caused by
A) Lack of insulin
Both glycogenesis and glycogenolysis are controlled primarily by the interplay between
the two hormones insulin and ________.
A) Glycogen synthetase
B) Glucagon
C) Fructose kinase
D) Glucose hydrolyase
E) Pentose kinase - CORRECT ANSWER-B
Hexokinase D is found in the _______.
A) Kidney
B) Liver
C) Heart
D) Muscle
E) Intestine - CORRECT ANSWER-B
An enzyme family called the _________ catalyzes the phosphorylation of hexoses in
the body.
A) Hexolysases
B) Phosphorolysases
C) Hexokinases
D) Glucokinases
E) Phosphofructokinases - CORRECT ANSWER-C
The conversion of glucose-1-phosphate to UDP-glucose has a DG0' near zero. Which
of the following reactions is coupled with the above reaction to drive it to completion?
A) Hydrolysis of PPi
B) Hydrolysis of ATP
C) Hydrolysis of ADP
D) Hydrolysis of UDP
E) Hydrolysis of UTP - CORRECT ANSWER-A
Which of the following is required for the conversion of UDP-glucose to glycogen?
A) Glycogen synthase
B) Branching enzyme
C) Glucose phosphorlyase
D) Debranching enzyme
E) Both A and B are correct - CORRECT ANSWER-E
, A glycogen molecule that has been degraded to its branch points is called
A) Dextrin
B) Glucose
C) Amylose
D) Limit dextrin
E) Both A and B are correct - CORRECT ANSWER-D
Regulation of glycolysis involves all of the following except
A) Insulin
B) Glucagon
C) SREBP1c
D) AMPK
E) None of the above - CORRECT ANSWER-E
the binding of insulin to receptors on the surface of muscle cells stimulates which of the
following processes
A) Glycogenolysis
B) Glycogenesis
C) Release of ATP
D) Formation of cyclic AMP
E) Release of glucagon - CORRECT ANSWER-B
Under stressful conditions epinephrine is released from the adrenal medulla. The
release of epinephrine has which of the following effects on glucose metabolism?
A) Glycogenolysis is stimulated
B) Glycogenesis is inhibited
C) Adenylate cyclase is activated
D) Both A and B are correct
E) All of the above are correct - CORRECT ANSWER-E
Phosphorylase kinase
A) Converts inactive phosphorylase to active phosphorylase
B) Converts active phosphorylase to inactive phosphorylase
C) Phosphorylates glycogen synthase
D) Convets ADP to ATP
E) Both B and C are correct - CORRECT ANSWER-A
Cori's disease is caused by
A) Lack of insulin
