Enzyme Action

Question 1

What happens when an enzyme denatures?

Answer 1

Its active site changes shape, meaning it can no longer bind to its substrate

Question 2

Explain how temperature affects enzyme activity

Answer 2

As temperature increases up to an optimum, rate of
reaction increases. The molecules gain kinetic energy so more frequent enzyme-substrate collisions occur.
However, as temperature increases above optimum, rate of
reaction decreases to 0 as enzymes denature so substrate no longer fits

Question 3

Explain how pH affects enzyme activity

Answer 3

Enzyme activity is at a maximum at an optimum pH
as pH is increased above or decreased below this,
enzyme activity decreases
above optimum pH enzymes denature
so substrate no longer fits