What will be the net yield of ATP (per glucose unit) starting from glycogen and ending at pyruvate?
A) 1 ATP
B) 2 ATP
C) 3 ATP
D) 4 ATP
E) 5 ATP

Question

Quizplus · Accepted Answer

When glycogen is broken down, it enters glycolysis as glucose-1-phosphate, which is converted to glucose-6-phosphate without using ATP. This saves one ATP compared to free glucose entering glycolysis, resulting in a net yield of 3 ATP per glucose unit from glycogen to pyruvate.

What Will Be the Net Yield of ATP (Per Glucose