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4 marksCellular Respiration and ATP Synthesis

CAPE Biology Unit 2 · 2005 · Paper 2 · Question 1(a)

An experiment uses three apparatus setups (A, B, and C) to measure oxygen uptake under different conditions using respirometer tubes containing germinating beans, soda lime, and capillary manometers with an oil drop.

Outline an experiment, based on the apparatus in Figures 1 A and B, to measure oxygen uptake in germinating beans.

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Other parts of this question

  1. 1(b)State the purpose of the thermometers used in the experimental apparatus in Figures 1 A and B.[1 mark]
  2. 1(c)Suggest whether the beans soaked in potassium cyanide will take up oxygen and provide ONE reason for your answer.[2 marks]
  3. 1(d)State what conclusion can be drawn from the results of Experiment 1 shown in Figure 2.[1 mark]
  4. 1(e)An artificial lipid vesicle with a proton pump and ATP synthase is used to pump hydrogen ions into the vesicle to create a gradient, which diffuse out through…[2 marks]

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