About how many net molecules of ATP are produced at the end of the three stages of aerobic respiration?
A) 38
B) 36
C) 32
D) 16
E) 4

Question

About how many net molecules of ATP are produced at the end of the three stages of aerobic respiration?  
A) 38
B) 36
C) 32
D) 16
E) 4

Quizplus · Accepted Answer

The net molecules of ATP produced at the end of the three stages of aerobic respiration are as follows:
Glycolysis - 2 ATP
Krebs cycle - 2 ATP (per glucose molecule broken down, so 2x2 = 4 ATP)
Electron transport chain - 32 ATP
Therefore, the total net molecules of ATP produced are 38, but since 2 ATP were used in the initial stage of glycolysis, we subtract that to get the final answer of 36 ATP.

About How Many Net Molecules of ATP Are Produced at the End