Glycogen: Structure, Function, and Enzyme Roles - Multiple Choice Questions

1. The glycogen molecule is: A) Nonosmotic Polymer B) Osmotic Disaccharide C) Nonosmotic Disaccharide D) Osmotic Polymer

2. How much in % of the liver's mass is made up of glycogen stores? a) 5% b) 2% c) 50% d) 10%

3. What tissue stores the most glycogen for the whole body? a) Liver b) Muscle c) Adipose Tissue d) Pancreas

4. What enzyme is responsible for breaking Glycogen down to α-D glucose 1-phosphate? a) Phosphoglucomutase b) Glucose-6-phosphatase c) Polysaccharide Phosphorylase d) Hekokinase

5. What enzyme is responsible for trapping glucose within the cell? a) Phosphoglucomutase b) Glucose-6-phosphatase c) Polysaccharide Phosphorylase d) Hekokinase

6. What enzyme is responsible for producing UDP glucose? a) Phosphoglucomutase b) Glucose-6-phosphatase c) Polysaccharide Phosphorylase d) Phosphate uridylytransferase

7. Why is branching important in glycogen structures? a) To increase solubility & increase rate of synthesis/degradation b) To decrease solubility & increase rate of synthesis/degradation c) To increase solubility & decrease rate of synthesis/degradation

8. What are the bonds that connect the units in the glycogen molecule? a) α1,6, α1,4 b) α1,6, α1,2 c) α1,4, α1,2

9. What term best describes Glycogenin? a) A primer for glycogen synthase b) A phosphorylation enzyme c) A lysis enzyme

10. Is the following statement true or false: 'The same pathway switches on glycogen breakdown as does it turns off glycogen synthesis' A) False B) True

Answers:

1. C) Nonosmotic Disaccharide
2. b) 2%
3. a) Liver
4. c) Polysaccharide Phosphorylase
5. d) Hekokinase
6. d) Phosphate uridylytransferase
7. a) To increase solubility & increase rate of synthesis/degradation
8. a) α1,6, α1,4
9. a) A primer for glycogen synthase
10. B) True