Which of the following statements best describes the electron-transport chain? A) It is a series of protein complexes that transfer electrons from NADH and FADH₂ to oxygen. B) It is another name for the citric acid cycle. C) It is the same thing as catabolism. D) It is cyclic, where the same oxygens are used over and over to transport electrons. E) All of the above are true.

Question

Quizplus · Accepted Answer

The electron-transport chain is composed of a series of protein complexes that transfer electrons from NADH and FADH2 to oxygen, ultimately producing ATP through oxidative phosphorylation. B is incorrect because the citric acid cycle is a separate metabolic pathway. C is incorrect because catabolism refers to the breakdown of molecules, while the electron-transport chain is a specific pathway for energy production. D is incorrect because the electron-transport chain is not cyclic in the sense that the same oxygens are used over and over; rather, oxygen is the final electron acceptor and is reduced to form water at the end of the chain.

Which of the Following Statements Best Describes the Electron-Transport Chain