A student investigates the effect of temperature on the rate at which catalase in pieces of liver breaks down hydrogen peroxide. The student collects the oxygen produced in 60 seconds at each temperature. The table shows the mean volumes collected.

Temperature ( $∘C^\circ\text{C}$ )	Mean volume of oxygen collected in 60 seconds ( $cm3\text{cm}^3$ )
20	12
30	28
40	43
50	18
60	3

Describe how the student could use these results and further tests to estimate the optimum temperature more precisely. Include how the student should make the investigation fair and reliable.

Temperature ( $∘C^\circ\text{C}$ )	Mean volume of oxygen collected in 60 seconds ( $cm3\text{cm}^3$ )
20	12
30	28
40	43
50	18
60	3

Describe how the student could use these results and further tests to estimate the optimum temperature more precisely. Include how the student should make the investigation fair and reliable.

1.2 What happens in cells (and what do cells need)?

Question 22

Markscheme

1.2 What happens in cells (and what do cells need)?

Question 22

Markscheme

1.2 What happens in cells (and what do cells need)?

Question 22

1.2 What happens in cells (and what do cells need)? Questions

1.2 What happens in cells (and what do cells need)?

Question 22

1.2 What happens in cells (and what do cells need)? Questions