In a biological reaction, succinate dehydrogenase catalyzes the conversion of succinate to fumarate. The reaction is inhibited by masonic acid, a substance that resembles succinate but cannot be acted upon by succinate dehydrogenase. Increasing the amount of succinate molecules to those of masonic acid reduces the inhibitory effect of masonic acid. Select the correct identification of the molecules described in the reaction.
a.) succinate is the substrate, and fumarate is the product in the reaction
b.) fumarate is the product, and masonic acid is a noncompetitive inhibitor in the reaction
c.) succinate dehydrogenase is the enzyme, and fumarate is the substrate in the reaction
d.) succinate dehydrogenase is the enzyme, and masonic acid is the substrate in the reaction
Answer: A