Ch 6 pt 4

Question 1

Enzymes speed up metabolic reactions by

Answer 1

lowering energy barriers.

Question 2

Catalyst

Answer 2

is a chemical agent that speeds up a reaction without being consumed by the reaction

Question 3

Enzyme

Answer 3

Is a catalytic protein

Question 4

activation energy (EA)

Answer 4

The initial energy needed to start a chemical reaction is called the free energy of activation

Question 5

The reactant that an enzyme acts on is called the enzyme’s

Answer 5

Substrate

Question 6

enzyme-substrate complex

Answer 6

The enzyme binds to its substrate

Question 7

Active site

Answer 7

the region on the enzyme where the substrate binds

Question 8

Induced fit

Answer 8

brings chemical groups of the active site into positions that enhance their ability to catalyze the reaction

Question 9

Competitive inhibitor

Answer 9

bind to the active site of an enzyme, competing with the substrate

Question 10

Noncompetitive inhibitors

Answer 10

bind to another part of an enzyme, causing the enzyme to change shape and making the active site less effective