Which of the following statements about oxidative phosphorylation by ATP synthas

Question

Which of the following statements about oxidative phosphorylation by ATP synthase is FALSE? A. The electrochemical gradient across the inner mitochondrial membrane generated by electron flow is used to synthesize ATP? B. Uncouplers dissipate the electrochemical gradient but electron transport continues without ATP production C. Inhibitors disrupt electron flow as well as ATP synthesis. D. A proton gradient does not have a sufficient amount of energy to drive the synthesis of ATP. E. ATP synthesis occurs via simultaneous conformational changes in protein subunits containing catalytic sites. Electron transport through NADH Coenzyme Q reductase (Complex I) is accompanied by transfer of ___protons from the matrix to the intermembrane space. A. 1 B 2 C. 3 D. 4

Explanation / Answer

19)E) the protein subunits undergo sequential conformational changes and not simultaneous

D)the proton gradient generated in ETC is what gives energy for the ATP synthesis

20) D 4

In complex 1 NADH is oxdised and ubiqinone is reduced and then it diffuses freely across the membrane causing the transfer of 4 H ions across the membrane creating a proton gradient

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