11. Which of the following statement about the mitochondrial electron transport chain is TRUE? (A) Complex I transfers electrons from FADH2 to ubiquinone, (B) The Q cycle mediated by Complex II reduces cytochrome c, (C) A single catalytic cycle of Complex III transports four protons from the intermembrane space to the matrix, (D) Complex IV uses electrons from cytochrome c to reduce O2 to H2O, (E) Electrons move from more positive to more negative reduction potentials.