TCA Cycle
Why is the TCA cycle the central pathway of metabolism of the cell?

All other metabolic pathways depend upon it
None of the above
It occurs in the center of the cell
Its intermediates are commonly used by other metabolic reactions

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TCA Cycle
The catabolism of sugars and fatty acids is similar because

All of these
both of these compounds are funnelled through the TC A/citric acid cycle
both of these compounds generate chemical energy during catabolism
both of these compounds generate redox energy during catabolism

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

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