Enzymes

Question 1

Definition of enzyme

Answer 1

A biological catalyst made from protein that speeds up a reaction without being used up

Question 2

How do enzymes work

Answer 2

Lower activation energy without being used up

Question 3

Induced-fit model

Answer 3

The active site of the enzyme slightly changes shape to become a perfect fit to the enzyme and create an enzyme-substrate complex

Question 4

They key term used to describe a substrate and enzyme coming together

Answer 4

Enzyme-substrate complex

Question 5

Lock and key model

Answer 5

Enzymes active site is already complimentary to the substrate shape

Question 6

Competitive enzyme inhibition

Answer 6

Enzyme inhibitor is a similar shape to the substrate so fits to the active site instead of the substrate stopping the formation of an enzyme-substrate complex

Question 7

Non-competitive enzyme inhibition

Answer 7

Enzyme inhibitor binds to allosteric site . This causes active site to change shape

Question 8

How to tell if the inhibition is competitive or non competitive by graph

Answer 8

If the enzyme activity increases when you increase the substrate concentration the concentration is competitive

Question 9

Factors affecting enzyme activity

Answer 9

Enzyme concentration
Substrate concentration
pH
Temperature