During the electron transport chain,cytochrome oxidase catalyzes the transfer for electrons from cytochrome c to oxygen in the mitochondria.Cyanide is a poison that inhibits the enzyme cytochrome oxidase.When cyanide is present,what will happen?
A)The electron transport chain will shut down.
B)The Kreb's cycle will no longer synthesize electron carriers.
C)Glycolysis will no longer produce pruvate.
D)All of the above

Question

Quizplus · Accepted Answer

Cyanide inhibits the enzyme cytochrome oxidase, which is important for the transfer of electrons from cytochrome c to oxygen in the electron transport chain. Therefore, if cyanide is present, this transfer of electrons will be blocked and the electron transport chain will shut down, leading to a lack of ATP production. The Kreb's cycle and glycolysis are upstream of the electron transport chain and do not directly involve cytochrome oxidase, so they will not be affected by the presence of cyanide.

During the Electron Transport Chain,cytochrome Oxidase Catalyzes the Transfer for Electrons