Which of the following illustrates the process of covalent catalysis in a hydrolysis reaction?

• A. An enzyme acts as a proton donor to facilitate the breakdown of the substrate.
• B. An enzyme forms a covalent bond with a substrate, facilitating its breakdown into products.
• C. An enzyme uses water to directly break the substrate into products without forming intermediates.
• D. An enzyme stabilizes the substrate without forming any covalent bonds.

Answer: (B)