Why is there a difference between the amount of ATP produced by glucose and by glycogen?
A) The breakdown of glycogen requires many more steps thus more ATP is produced along the way.
B) The breakdown of glycogen requires less ATP in the energy investment phase.
C) Glucose and glycogen use very different metabolic pathways to yield pyruvate and that accounts for the difference in ATP production.
D) Less water is produced when glucose is the starting compound and that directly affects ATP production.

Question

Quizplus · Accepted Answer

Glycogen is a stored form of glucose in the muscles and liver. When glycogen is broken down, it enters the glycolysis pathway at a later stage than glucose, which requires an investment of 2 ATP. Since glycogen is already stored in the body and does not require ATP to be transported, the breakdown of glycogen requires less ATP in the energy investment phase, thus more ATP can be produced in the end.

Why Is There a Difference Between the Amount of ATP