Enzyme Structure and Function

Question 1

What is the active site?

Answer 1

region in an enzymes three dimensional structure that is directly involved in catalysis

Question 2

What is the reactant in an enzyme-catalyzed reaction called?

Answer 2

substrate

Question 3

What does the active site model mean?

Answer 3

also known as the lock and key hypothesis, states that the substrate and active are perfectly complementary

Question 4

What does the induced fit model state?

Answer 4

states that the substrate and active site differ slightly in structure and that the binding of the substrate induces a conformational change in the enzyme

Question 5

What is a recognition pocket?

Answer 5

pocket in the enzymes structure which attracts certain residues on substrate polypeptides

Question 6

What is a cofactor?

Answer 6

metal ions or small molecules required for activity in many enzymes

Question 7

What is a coenzyme?

Answer 7

when a cofactor is an organic molecule