Question bank1.2 What happens in cells (and what do cells need)?

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

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Question 35

A student investigates how temperature affects catalase from liver.

She adds the same mass of liver to hydrogen peroxide at each temperature. She records the volume of oxygen collected during the first 40 seconds of each reaction.

Temperature in $∘C^\circ\text{C}$	Volume of oxygen collected in 40 seconds in $cm3\text{cm}^3$
20	16
30	28
40	36
50	10
60	2

Use the equation

$oxygentime\text{rate} = \dfrac{\text{volume of oxygen}}{\text{time}}$

Calculate the missing value in the partly completed working for $∘C20\ ^\circ\text{C}$ .

$cm3s−1\text{rate} = \dfrac{16}{40} = \underline{\hspace{1.5cm}}\ \text{cm}^3\text{s}^{-1}$

[1]

State the temperature at which the activity of catalase was highest.

[1]

Explain why the activity of catalase increased between $∘C20\ ^\circ\text{C}$ and $∘C40\ ^\circ\text{C}$ .

[2]

Question bank1.2 What happens in cells (and what do cells need)?

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

Question 35

A student investigates how temperature affects catalase from liver.

She adds the same mass of liver to hydrogen peroxide at each temperature. She records the volume of oxygen collected during the first 40 seconds of each reaction.

Temperature in $∘C^\circ\text{C}$	Volume of oxygen collected in 40 seconds in $cm3\text{cm}^3$
20	16
30	28
40	36
50	10
60	2

Use the equation

$oxygentime\text{rate} = \dfrac{\text{volume of oxygen}}{\text{time}}$

Calculate the missing value in the partly completed working for $∘C20\ ^\circ\text{C}$ .

$cm3s−1\text{rate} = \dfrac{16}{40} = \underline{\hspace{1.5cm}}\ \text{cm}^3\text{s}^{-1}$

[1]

State the temperature at which the activity of catalase was highest.

[1]

Explain why the activity of catalase increased between $∘C20\ ^\circ\text{C}$ and $∘C40\ ^\circ\text{C}$ .

[2]

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

Question 35

Markscheme

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

Question 35

Markscheme

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

Question 35

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

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

Question 35

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