19. Enzymes

What is the activation energy for a reaction? Why is activation energy necessary?

Why do chemical reactions in the body require enzymes?

a. Write an equation that represents an enzyme-catalyzed reaction.

How do enzymes differ from catalysts used in chemical laboratories? (16.4)

Maltase is an enzyme that hydrolyzes maltose to two glucose molecules. (16.4)

b. Draw an energy diagram for the reaction with and without maltase.

What is the name of the class of enzymes that would catalyze each of the following reactions?

c. splitting peptide bonds in proteins

What level of protein structure is involved in the formation of an enzyme’s active site?

What is the name given to the reactant of an enzyme-catalyzed reaction?

What is the name given to a small, organic nonprotein part of an enzyme that is involved in catalysis?

Match the terms (2) enzyme with the following descriptions:

a. has a tertiary structure that recognizes the substrate

b. is the combination of an enzyme with the substrate

c. has a structure that fits the active site of an enzyme