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How does ATP synthase obtain the energy to produce ATP?


A) Hydrogen ions flow down a concentration gradient from the thylakoid space to the stroma through ATP synthase, releasing energy that can be used to produce ATP from ADP + Pi.
B) Water splits, releasing electrons that flow from the stroma to the thylakoid space and attach to the active site of ATP synthase.
C) Electrons from the reaction site center of photosystem II are funneled to ATP synthase, which uses the energy to produce ATP from ADP + Pi.
D) Hydrogen ions in the thylakoid space combine with electrons from the stroma at ATP synthase, releasing energy that can be used to produce ATP from ADP + Pi.
E) A hydrogen ion from NADPH is used by ATP synthase to power the production of ATP from ADP + Pi, and an electron is released, splitting water.

F) All of the above
G) A) and B)

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Which of the following events does NOT take place in the light reactions?


A) transfer of electrons to the reaction center of photosystem I
B) generation of ATP from ADP + Pi
C) splitting of water, releasing an electron
D) generation of NADPH from NADP+
E) conversion of 3PG to G3P

F) All of the above
G) B) and C)

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The innermost compartment of a chloroplast formed by the interconnected thylakoids is the


A) stroma.
B) thylakoid membrane.
C) chlorophyll.
D) thylakoid space.
E) leaf space.

F) A) and B)
G) C) and E)

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