TCA Cycle
Which of the following is involved in energy production?

Conversion of compounds with high energy to those of low energy
Transport of electrons on organic molecules
Generation of proton gradients across membranes
All of these

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TCA Cycle
Most multi-cellular organisms obtain energy for the synthesis of ATP during oxidative phosphorylation from

a proton gradient across the outer mitochondrial membrane
a proton gradient across the inner mitochondrial membrane
a proton gradient across the cell membrane
high energy phosphate compounds

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