<prompt> All the following are inhibitors of cytochrome oxidase exceptCarbon monoxideAmytalCyanideAzide  <response>: Site-III Complex IV Cyanide H2S Azide transfer of electrons to molecular O2 Co Carbon monoxide: Inhibits Cyt. oxidase by combining with O2 binding site. It can be reversed by illumination with light. Amobarbital Amytal and Secobarbital: Inhibits electron transfer through NADH-Q reductase.Ref: MN Chatterjea Textbook of Medical Biochemistry, 8th edition, page no: 143 