Question

The electron transport chain of the light reactions is responsible for energy coupling. Which statement correctly describes the energy coupling that occurs here?

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__	The electrons will decrease in potential energy as they are passed along, and this will be used to power the active transport of hydrogen ions.

__	The reduction of oxygen at the bottom of the electron transport chain will release energy, and this will be used to synthesize ATP.

__	The conversion of NADP+ into NADPH will release energy, and this will be used to reduce carbon dioxide into glyceraldehyde-3-phosphate.

__	The facilitated diffusion of water across the thylakoid membrane will release energy, and this will be used to generate an electrochemical gradient of electrons.