observations would not support the chemiosmotic model of oxidative phos- 3. Whic
ID: 220335 • Letter: O
Question
observations would not support the chemiosmotic model of oxidative phos- 3. Which of the following experimental A. II mitochondrial membranes are ruptured, oxidative phosphorylation cannot occur B. Raising the pH of the fuid in the intermembrane space results in ATP synthesis in the matrix. C. Transfer of electrons through the respiratory chain results in formation of a proton gradient across the inner mitochondrial membrane D. The orientation of the enzyme complexes of the electron transfer chain results in a unidirectional now of H E. Radioactively labeled inorganic phosphate is incorporated into cytosolic ATP only in the presence of an H gradient across the inner mitochondrial membrane. The proton-motive force generated by the electron transfer chain: A. includes a pH-gradient component. B. includes an electrical-potential-gradient component C. is used for active transport processes. D. is used to synthesize ATP E. has all of the above characteristics. 4.Explanation / Answer
3. B. Raising the pH of the fluid in innermembrane space results in ATP synthesis in matrix.
4. D. It is used to synthesize ATP.
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