Does an enzyme catalyze a large number of different reactions

Answer: No

Explanation:

The answer is No, because enzymes are specific in action. In essence, an enzyme has an active site in its structure that can only permit the conversion of one substrate OR a group of similar subtrates into products. For example, lactase catalyze only the break down of lactose sugar and nothing else

Thus, an enzyme cannot catalyze a large number of different reactions.