ABI 103 CHAPTER 16 SHORT NOTES BASED ON
QUESTIONS AND ANSWERS 100% CORRECT!!
What is glycogen? Answers :alpha 1,4 linked D glucose
alpha 1,6 branches every 8-14 in granules
Why is a constant supply of glucose important? Answers :Essential for the brain and red blood cells
Where is the majority of glycogen stored? Answers :Liver
How long can liver glycogen stores last? Answers :1/2 day (in terms of brain glucose)
During fasting conditions, how are the majority of the body's glucose needs met? Answers :gluconeogenesis
What is McArdle's disease? Answers :Lack of glycogen phosphorylase (for glycogen breakdown)
Not enough glycolysis to keep up with ATP demand=painful muscle cramps during
exertion
What is the key branch point in glucose metabolism? Answers :G6P What are the 3 different ways G6P can be obtained? Why is it important that there is more than one way? Answers :Glycogen breakdown
Gluconeogenesis
Hexokinase
Allows for flexibility
What is the sequence of molecules involved with glycogen breakdown? Answers :Gylcogen
G1P
G6P
Glucose
How does the branching of gylcogen contribute to its breakdown? Answers :Makes it easier to break down; more than 1 starting point
How do you get from glycogen to glucose? Answers :3 enzymes needed to break it down
How many reducing vs nonreducing ends does glycogen have? Answers :1 reducing end
multiple nonreducing ends depending on the amount of branches
In what order are glucose removed from glycogen? Answers :Removed from non-reducing end first
QUESTIONS AND ANSWERS 100% CORRECT!!
What is glycogen? Answers :alpha 1,4 linked D glucose
alpha 1,6 branches every 8-14 in granules
Why is a constant supply of glucose important? Answers :Essential for the brain and red blood cells
Where is the majority of glycogen stored? Answers :Liver
How long can liver glycogen stores last? Answers :1/2 day (in terms of brain glucose)
During fasting conditions, how are the majority of the body's glucose needs met? Answers :gluconeogenesis
What is McArdle's disease? Answers :Lack of glycogen phosphorylase (for glycogen breakdown)
Not enough glycolysis to keep up with ATP demand=painful muscle cramps during
exertion
What is the key branch point in glucose metabolism? Answers :G6P What are the 3 different ways G6P can be obtained? Why is it important that there is more than one way? Answers :Glycogen breakdown
Gluconeogenesis
Hexokinase
Allows for flexibility
What is the sequence of molecules involved with glycogen breakdown? Answers :Gylcogen
G1P
G6P
Glucose
How does the branching of gylcogen contribute to its breakdown? Answers :Makes it easier to break down; more than 1 starting point
How do you get from glycogen to glucose? Answers :3 enzymes needed to break it down
How many reducing vs nonreducing ends does glycogen have? Answers :1 reducing end
multiple nonreducing ends depending on the amount of branches
In what order are glucose removed from glycogen? Answers :Removed from non-reducing end first
