B2 : Factors affecting enzyme action

Question 1

What factors affect biological reactions

Answer 1

Concentration, temperature and surface area

Question 2

After what temperature do enzymes start to become denatured

Answer 2

41*C

Question 3

How does low temperature affect enzymes

Answer 3

The reaction is slow as the enzymes don’t have enough kinetic energy and rarely collide with their substrate

Question 4

How does high temperature affect enzymes

Answer 4

The rate of an enzyme-controlled reaction will speed up until it becomes denatured and loses shape

Question 5

What are extremophiles

Answer 5

Organisms that live in extreme environments and have enzymes that work at temperatures of up to 80*C

Question 6

What is the optimum pH

Answer 6

The pH where enzymes work their fastest

Question 7

What is pepsin

Answer 7

A protease released by glands in the stomach , pepsin is adapted at a low pH (acidic) in return, the stomach adds hcl to ensure the pepsin works effectively

Question 8

Why does the stomach produce mucus

Answer 8

To coat the stomach and prevent hcl from digesting the walls of the stomach

Question 9

Where is bile stored

Answer 9

Gall bladder

Question 10

Why is bile released into the small intestine

Answer 10

To neutralise the acidic solution from the stomach