Topic 2.5

Question 1

What is an enzyme

Answer 1

Enzyme: a protein that works as a catalyst. It speeds up reactions without altering itself

Question 2

How does an enzyme work

Answer 2

A substrate will bind to an active site connected to an enzyme and the substrate will then become a product

Question 3

What is the general equation for an enzyme- catalysed reaction

Answer 3

Substrate + Enzyme (active site) = Product

Question 4

Explain enzyme substrate specficity

Answer 4

The shape of substrates has to match the shape of the active site. Specific enzymes are needed for specific reasons

Question 5

List and explain the factors affecting enzyme activity

Answer 5

Temperature, concentration and pH

Question 6

Describe denaturation and how it affects enzyme action

Answer 6

Denaturation is the change of a structure (perm). When bonds break they become denatured so the substrates can no longer fit into the active site. This slows down collisions

Question 7

What are advantages of enzyme immobilization

Answer 7

Enzymes can be recycled
Enzymes can be removed to control the process
Increase of enzyme condensation
Increase stability of enzymes