Which of the following respiratory inhibitors does not block the final step of electron transport,the reduction of oxygen to form water? A) Azide (N³⁺) B) Cyanide (CN^1-) C) Carbon Monoxide (CO) D) Rotenone E) All of these block the last reaction of electron transport.

Question

Quizplus · Accepted Answer

Rotenone inhibits the transfer of electrons from complex I to ubiquinone and does not directly affect the final step of electron transport, which is the reduction of oxygen to form water. Therefore, it is the only respiratory inhibitor among the options presented that does not block the final step of electron transport. The other options (Azide, Cyanide, and Carbon Monoxide) all block the final step of electron transport by binding to and inhibiting cytochrome c oxidase, thereby preventing the reduction of oxygen to water.

Which of the Following Respiratory Inhibitors Does Not Block the Final