Which of the following enzymes serve as catalysts in metabolism?

Amylase, Lactase and Pepsin all serve as catalysts in metabolism. A catalyst is a chemical that increases the rate of a chemical reaction without being changed by the reaction itself. Enzymes are catalytic proteins and they are only found in living organisms as part of their life processes.

Explanation:

lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.