Photosynthesis and Respiration
The manufacture of ATP in both photosynthesis and respiration is made possible by

All of these
the existence of a proton gradient across specific membranes
energy from the movement of electrons
the action of ATP synthase

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

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