The Enzymes Catalase and Malate Dehydrogenase Are Both Classified as Oxidoreductases.Catalase

question 189

Multiple Choice

The enzymes catalase and malate dehydrogenase are both classified as oxidoreductases.Catalase has a heme group present at its catalytic site, whereas malate dehydrogenase has no bound cofactors or prosthetic groups and uses NAD⁺ as a coenzyme.What can you infer about these two enzymes?

• A) Both use the same mechanism to transfer electrons during an oxidation-reduction reaction.
• B) One uses induced fit to facilitate transfer of electrons from one group to another, while the other does not.
• C) One uses specific binding sites to orient the substrate for electron transfer, while the other does not.
• D) One uses covalent catalysis, while the other uses acid-base catalysis to transfer electrons.
• E) One uses metal ion catalysis, while the other uses a nonmetal group to transfer electrons.