Photosynthesis and Respiration
Where does the O2 come from that is essential for the proper functioning of oxidative phosphorylation?

Dark reactions of photosynthesis
Light reactions of photosynthesis
Fermentation
Carbon fixation

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Photosynthesis and Respiration
What do coenzyme A, CO2, oxaloacetate, and FADH2 all have in common?

They are part of the reactions of lactic acid fermentation
They are all components or products of the citric acid cycle
They are part of the dark reactions of photosynthesis
They are all elements of oxidative phosphorylation

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