Evaluate the role of FADH2 produced during the conversion of succinate to fumarate in the electron transport chain.

• A. FADH2 is used directly to synthesize ATP.
• B. FADH2 is converted into NADH.
• C. FADH2 acts as an electron carrier in the electron transport chain.
• D. FADH2 releases carbon dioxide in the electron transport chain.

Answer: (C)