Photosynthesis and Respiration
If the oxygen is labeled in CO2 and provide this CO2 to a plant, where it is expected to find this labeled oxygen after the plant had undergone photosynthesis?

In the oxygen given off by the plant
In the carbohydrate produced
In the water used
In the NADPH

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

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

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