BMSC 230 Module 5 Exam Questions
and Answers
Which of the following statements about the hormonal regulation of glycogen
synthesis and degradation are correct?
- Glucagon and epinephrine have opposing effects on glycogen metabolism
- Insulin increases the capacity of the liver to synthesize glycogen
- Glucagon stimulates the breakdown of glycogen, particularly in the liver
- The effects of epinephrine, glucagon, and insulin are mediated by cyclic AMP
- Insulin is released in response to low levels of blood glucose - ANSWER-- Insulin
increases the capacity of the liver to synthesize glycogen
- Glucagon stimulates the breakdown of glycogen, particularly in the liver
Which statement about glycogen is CORRECT?
- It is a linear polymer of up to 30 000 glucose molecules
- Glycogen is stored in the mitochondria
- Both its synthesis and degradation pathways connect to glycolysis
- Glycogen synthesis begins on a protein called fibrinogen - ANSWER-- Both its
synthesis and degradation pathways connect to glycolysis
What aspect of glycogen is particularly important to ensure high rates of synthesis
and degradation?
- The a-1,4-glycosidic bonds present in glycogen
- The intracellular location of glycogen
- Its water solubility
- The highly branched structure - ANSWER-- The highly branched structure
How frequently do a-1,6 linkages occur in glycogen? - ANSWER-On average about
10 glucose residues apart
The name of the enzyme that interconverts glucose-6-P and glucose-1-P is" -
ANSWER-Phosphoglucomutase
What are the products of the reaction catalyzed by glycogen phosphorylase? -
ANSWER-Glucose-1-P and glycogen that is one glucose molecule shorter
Debranching enzyme: - ANSWER-differs from glycogen phosphorylase in that is
releases free glucose
Glycogen synthase and glycogen phosphorylase share this property. - ANSWER-
They are both regulated by the cAMP signalling system.
Which of the following statements about glycogen storage disease is CORRECT?
and Answers
Which of the following statements about the hormonal regulation of glycogen
synthesis and degradation are correct?
- Glucagon and epinephrine have opposing effects on glycogen metabolism
- Insulin increases the capacity of the liver to synthesize glycogen
- Glucagon stimulates the breakdown of glycogen, particularly in the liver
- The effects of epinephrine, glucagon, and insulin are mediated by cyclic AMP
- Insulin is released in response to low levels of blood glucose - ANSWER-- Insulin
increases the capacity of the liver to synthesize glycogen
- Glucagon stimulates the breakdown of glycogen, particularly in the liver
Which statement about glycogen is CORRECT?
- It is a linear polymer of up to 30 000 glucose molecules
- Glycogen is stored in the mitochondria
- Both its synthesis and degradation pathways connect to glycolysis
- Glycogen synthesis begins on a protein called fibrinogen - ANSWER-- Both its
synthesis and degradation pathways connect to glycolysis
What aspect of glycogen is particularly important to ensure high rates of synthesis
and degradation?
- The a-1,4-glycosidic bonds present in glycogen
- The intracellular location of glycogen
- Its water solubility
- The highly branched structure - ANSWER-- The highly branched structure
How frequently do a-1,6 linkages occur in glycogen? - ANSWER-On average about
10 glucose residues apart
The name of the enzyme that interconverts glucose-6-P and glucose-1-P is" -
ANSWER-Phosphoglucomutase
What are the products of the reaction catalyzed by glycogen phosphorylase? -
ANSWER-Glucose-1-P and glycogen that is one glucose molecule shorter
Debranching enzyme: - ANSWER-differs from glycogen phosphorylase in that is
releases free glucose
Glycogen synthase and glycogen phosphorylase share this property. - ANSWER-
They are both regulated by the cAMP signalling system.
Which of the following statements about glycogen storage disease is CORRECT?
