Which of the following does not participate in, nor is a component of, the electron-transport chain?
A) coenzyme A
B) nonheme, iron-sulfur proteins
C) coenzyme Q
D) cytochrome c1
E) NADH

Question

Quizplus · Accepted Answer

Coenzyme A is not a component of the electron-transport chain. It is involved in the citric acid cycle as a carrier of acetyl groups. The other choices are all components of the electron-transport chain. Nonheme, iron-sulfur proteins, coenzyme Q, cytochrome c1, and NADH all play important roles in the electron-transport chain, transferring electrons from one molecule to another and ultimately producing ATP through oxidative phosphorylation.

Which of the Following Does Not Participate In, nor Is