Enzymes and temperature

Question 1

Are enzymes more or less sensitive to temperature changes than pH changes?

Answer 1

They are less sensitive to temperature changes

Question 2

What does an increase in temperature cause? (3)

Answer 2

An increase in temperature causes increased molecular movement.

As a result, substrate molecules collide more frequently with enzymes.

The reaction rates rise as temperatures rise

Question 3

What happens when an enzyme is above a certain temperature?

Answer 3

Each enzyme and active site starts to change its shape and lose its efficiency above a certain temperature

Question 4

What is the ideal temperature for most plant enzymes?

Answer 4

between 20 and 30 degrees C

Question 5

What is the ideal temperature for human enzymes?

Answer 5

37 degrees C

Question 6

What happens when an enzyme is below a certain temperature (below 0 for water)?

Answer 6

Ice forms and the cells contents become frozen solid preventing the enzyme from working