Based on the information in the chapter,which of the following is TRUE regarding Complex III?
(I) A large portion of Complex III dissociates from the membrane bound portion of the complex.
(II) Complex III contains three identical cytochrome redox centers.
(III) The Q cycle allows stepwise reoxidation of the two electrons from CoQH₂.
(IV) A change in conformation of iron sulfur protein (ISP) ensures that the Reiske center is reduced preferentially by CoQ^.-.

Question

Quizplus · Accepted Answer

From the information provided in the chapter, only statement III is true regarding Complex III. The Q cycle in Complex III allows for the stepwise reoxidation of the two electrons from CoQH2 to cytochrome c, and this is an essential process in the electron transport chain. Statements I and IV are both false, and statement II is partially incorrect as Complex III contains three cytochrome redox centers, but they are not necessarily identical.

Based on the Information in the Chapter,which of the Following