enzymes

Question 1

what is an active site?

Answer 1

indented area of enzyme. complementary shape to enzyme

Question 2

what is a cofactor?

Answer 2

a substance that has to be present to ensure that the enzyme catalysed reaction takes place at the appropriate rate.

Question 3

what is a prosthetic group?

Answer 3

part of the enzyme structure, form temporary associations with the enzyme

Question 4

what is an enzyme substrate complex?

Answer 4

complex formed by temporary binding of enzyme and substrate molecules.

Question 5

what is the lock and key hypothesis?

Answer 5

substrate is complementary to the active site of the enzyme.

Question 6

what is the induced fit hypothesis?

Answer 6

the substrate is no complementary to the active site however the active site changes in order to fit the substrate.

Question 7

what are the factors that effect enzyme activity?

Answer 7

• temperature
• pH
• substrate availability

Question 8

what is a competitive inhibitor?

Answer 8

competitive inhibitor is something that blocks the active site so the substrate cannot bind.

Question 9

what is a non competitive inhibitor?

Answer 9

a non competitive inhibitor binds to the allosteric site and changes the shape of the active site, therefore the substrate cannot bind.