AP Biology Unit 3

What is a substrate?

A reactant that is charged by the enzyme

What is the active site?

Where the substrate binds

How does the active site bond the substrate?

It matches the shape and chemical properties of the substrate

What is an enzyme-substrate complex?

When the enzyme and substrate bond together

T/F Enzymes are reusable, and they are not changed in the reaction.

True

What is an enzyme?

Biological catalysts that facilitate chemical reactions in cells by lowering the activation energy

Describe the relation between the shape and chemical properties of an enzyme’s active site to the shape of the substrate. (Hint: similar)

The active site

What are enzymes made of? (macromolecule)

Proteins

How do enzymes affect the activation energy?

They lower it

How do enzymes affect the speed of a reaction?

The speed it up

How do enzymes speed up a reaction?

By stabilizing a transition state in the reaction, decreasing the reaction’s activation energy.

T/F Dehydration synthesis and hydrolysis do NOT require enzymes to occur

False, they require enzymes to occur