5. The process of glycolysis occurs in the cytoplasm. The electrons from the NAD

Question

5. The process of glycolysis occurs in the cytoplasm. The electrons from the NADH generated during glycolysis: A. cannot be used by the mitochondrial electron transport chain because NADH cannot enter the mitochondria. B. enter the mitochondrial electron chain directly because NADH freely enters the mitochondria. C. may enter the electron transport chain either at the level of NADH or FADH2, depending on the shuttle system used to transport them into the mitochondria. 6. Which of the following names best describes the main function performed by Complex V? A. Complex V is best described as the mitochondrial ATP synthase because its main function to produce ATP from ADP and Pi. B. Complex V is best described as the mitochondrial ATPase because its main function is to hydrolyze ATP. C. Complex V is best described as VDAC, for voltage-dependent anion channel. 7. Which of the following describes the direction of proton movement relative to electron transfer and phosphorylation? A. Electron transfer pumps protons into the matrix. As the protons leave the matrix through the ATP synthase, ATP is produced in the matrix. B. Electron transfer pumps protons into the matrix. As the protons leave the matrix through the ATP synthase, ATP is produced on the opposite side of the membrane. C. Electron transfer pumps protons out of the matrix. As the protons reenter through the ATP synthase, ATP is produced in the matrix.

Explanation / Answer

Ans:
5) C. may enter the electron transport chain either at the level of NADH or FADH2, depending on the shuttle system used to transport them into the mitochondria
6) A. Complex V is best described as the mitochondrial ATP synthase because its main function to produce ATP from ADP and Pi.
7) C. Electron transfer pumps protons out of the matrix. As the protons reenter through the ATP synthase, ATP is produced in the matrix.

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