Photosynthesis and Respiration
Assume the combined processes of photosynthesis and cellular respiration, the electrons that start as part of H2O at the beginning of the light reactions end up attaching to

electron transport carriers to make O2
pyruvate to make ethanol
O2 to make new H2O
NADPH to make new glucose

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Photosynthesis and Respiration
Which of the following statements about energy metabolism is false?

Plants provide the water and CO2 that animals need to carry out respiration
All animals in some way rely on plants for their energy
The energy that powers living systems ultimately comes from the sun
All eukaryotic organisms carry out respiration in the presence of O2

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

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

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