How does a lack of oxygen most directly cause a decrease in the activity of the Krebs cycle?
A) The synthesis of lactate from pyruvate is inhibited.
B) High levels of malonyl CoA inhibit carnitine acyl transferase I.
C) Electron transport is interrupted.
D) Circulating levels of epinephrine are increased.
E) The rate of glycogenolysis decreases.

Question

Quizplus · Accepted Answer

The Krebs cycle relies heavily on oxidative phosphorylation, which requires oxygen to accept electrons from the electron transport chain. Without oxygen, electron transport is interrupted, leading to a decrease in the activity of the Krebs cycle.

How Does a Lack of Oxygen Most Directly Cause a Decrease