The redox reaction in which succinate is converted to fumarate uses FAD rather than NAD+ because
A) FAD is a stronger oxidizing agent than NAD+
B) NAD+ is a stronger oxidizing agent than FAD
C) FAD is required for the oxidation of carboxylic acids
D) Only FAD can penetrate into mitochondria
E) NAD is not found in the cytoplasm.
Answer: A) FAD is a stronger oxidizing agent than NAD+