How does Complex II contribute to oxidative phosphorylation despite not pumping protons?

• A. By acting as the final electron acceptor in the electron transport chain.
• B. By transferring electrons from succinate to FAD, forming FADH2, which then passes electrons to ubiquinone.
• C. By pumping protons into the intermembrane space.
• D. By directly synthesizing ATP from ADP and inorganic phosphate.

Answer: (B)