Enzymes

Question 1

Enzyme Function

Answer 1

Lowers the activation energy of the specific reaction it catalyses

Question 2

Lock and Key hypothesis

Answer 2

The enzymes active site and the substrate are complementary.

Question 3

Induced fit theory

Answer 3

The substrate changes the active sites tertiary structure.
Making it complementary.

Question 4

Factors affecting ROR

Answer 4

Temperature
pH
Enzyme Concentration
Substrate Concentration

Question 5

Temperature

Answer 5

Below optimum
- lack the energy to make enzyme substrate complexes
Above optimum
- enzyme denatures
- Hydrogen and ionic bonds break
- changing tertiary structure
- so active site is no longer complementary

Question 6

pH

Answer 6

Optimum pH
The enzyme denatures either side

Question 7

Enzyme Concentration

Answer 7

As concentration increases rate if reaction increases
More succesful collisions

Question 8

Substrate Concentration

Answer 8

As concentration increases ROR increases
More succesful collisions

Question 9

Inhibitor function

Answer 9

Slow the rate of enzyme reactions

Question 10

Competitive Inhibitors

Answer 10

Similar shape to substrate
Temporarily bind to enzyme Active site
Stopping enzyme substrate complex

Question 11

Non-Competitive Inhibitor

Answer 11

Bind to allosteric site
Affects Hydrogen and ionic bonds
Temporarily changing active site