What is the P:O ratio for electrons entering the electron-transport chain that originate from reoxidation of acyl-CoA dehydrogenase?
A) greater than the P:O ratio for NADH reoxidation
B) approximately the same as the P:O ratio for NADH reoxidation
C) less than the P:O ratio for NADH reoxidation but more than the P:O ratio for Complex II reoxidation
D) approximately the same as the P:O ratio for Complex II reoxidation
E) less than the P:O ratio for Complex II reoxidation

Question

Quizplus · Accepted Answer

The P:O ratio for electrons entering the electron-transport chain from the reoxidation of acyl-CoA dehydrogenase is approximately the same as the P:O ratio for Complex II reoxidation. This is because the electrons from acyl-CoA dehydrogenase enter the electron transport chain at a point similar to where FADH2 (which is reoxidized by Complex II) enters, thus yielding a similar number of ATP molecules per oxygen atom reduced.

What Is the P:O Ratio for Electrons Entering the Electron-Transport