Why Is There a Difference Between the Amount of ATP

Multiple Choice

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.