Enzymes

Question 0

What is a substrate

Answer 0

The molecule which an enzyme acts on

A substrate fits into the active site of an enzyme

Question 1

What is an enzyme

Answer 1

A biological catalyst that speeds up the rate of a reaction (they are proteins)
They remain unchanged during chemical reactions

Question 2

Give an example of a synthesis reaction ( when enzymes build up large molecules from smaller molecules)

Answer 2

Substrate Enzyme Product Glucose———->phosphorylase—>starch

Question 3

Give an example of a degradation reaction (when an enzyme breaks down large molecules into smaller molecules)

Answer 3

Starch———->maltose———–>amalyse (SAM)

Question 4

What is an enzymes active site

Answer 4

A region of a molecules surface

Question 5

What does it mean by an enzyme being specific

Answer 5

The active site is complimentary in shape to the substrate molecules and binds to them specifically- different enzymes are responsible for different reactions

Question 6

Describe the effect of temperature on enzyme activity

Answer 6

Warmer conditions=cause enzyme and substrate molecules to move faster and so meet mor

Question 7

Describe th

Answer 7

Hat

Question 8

Describe the effect of temperature on enzyme activity

Answer 8

Warmer conditions= cause enzyme+substrate molecules to move faster so they meet more which results in increased rates of reaction.
But
When temperature gets to high= active site of enzyme changes shape and can no longer bind with the substrate- becomes denatured.

Question 9

Describe the effect of PH on enzyme activity

Answer 9

There is an optimum PH at which the enzymes work best at
At other PH values the enzyme works less or not all all
Pepsin: optimum-2 Working range-0-3
Amalyse: optimum-7 Working range-4-9

Question 10

What does optimum mean

Answer 10

The point where each enzyme works best at