Question

Enzymes are proteins that act as _____ for biological reactions.

Answer 1

The answer is catalysts. Catalysts speed up the rate of a reaction without  getting consumed in the process. Catalysts, in this case, enzymes act by reducing the activation energy or changing the reaction mechanism (such as foregoing some transition states). A popular enzyme is a carbonic anhydrase that catalyzes the formation of carbonic acid in the blood plasma (from carbon dioxide and water), a critical function in regulating blood pH.

Answer 2

Enzymes are proteins that act as catalysts for biological reactions. 

Enzymes work specifically to speed up the rate of the chemical reactions that occur inside a cell. They are needed for vital life functions. They aid in digestion and metabolism, They are so important that if one enzyme is missing or defective, the effects would be devastating.