

TCA Cycle - Medical Science
Q1: Most multi-cellular organisms obtain energy for the synthesis of ATP during oxidative phosphorylation fromA high energy phosphate compounds
B a proton gradient across the inner mitochondrial membrane
C a proton gradient across the cell membrane
D a proton gradient across the outer mitochondrial membrane
ANS:B - a proton gradient across the inner mitochondrial membrane During TCA, electron carriers are generated in the cell, examples of this are the conversion of NAD+ to NADH and a proton & FAD to FADH2. These electron carriers can drive the movement of protons from the mitochondrial matrix to the space between the inner and outer membranes of the mitochondria via a chain of associated complexes in the inner mitochondrial membrane, we know this as the Electron transport chain. |


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