TCA Cycle
In eukaryotes, electron transport occurs in

cytoplasm
All of these
endoplasmic reticulum
membranes and mitochondria

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

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