Quelpr
1 markCellular Respiration and ATP Synthesis

CAPE Biology Unit 2 · 2008 (Rest of Region) · Paper 2 · Question 1(b)(i)

Table 1 presents data on cumulative oxygen uptake (cm³) by germinating and dry peas at 10 °C and 25 °C over 30 minutes.

Suggest a control for this experiment.

This question uses a figure or table from the paper — you'll see it when you practise.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 1(a)Explain how the respirometer apparatus is used to measure the rate of oxygen uptake by organisms.[6 marks]
  2. 1(b)(ii)Plot the results for the germinating peas at 25 °C on the graph grid provided.[4 marks]
  3. 1(b)(iii)Calculate the rate of oxygen consumption for germinating peas at BOTH temperatures (10 °C and 25 °C) using the time interval between 10 and 20 minutes.[2 marks]
  4. 1(b)(iv)a)Comment on the differences in oxygen consumption observed between germinating peas at 10 °C and 25 °C.[1 mark]
  5. 1(b)(iv)b)Comment on the differences in oxygen consumption observed between germinating and dry peas.[1 mark]

More practice: the rest of this paper · more Cellular Respiration and ATP Synthesis questions · all CAPE Biology Unit 2 past papers