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2 marksCellular Respiration and ATP Synthesis

CAPE Biology Unit 2 · May/June 2024 · Paper 2 · Question 1(b)(iii)

Figure 3 shows a simple respirometer setup to determine the rate of respiration in germinating beans. The procedure involves assembling the respirometer with soda lime, removing the testa from germinating beans A and B, placing 5g of bean A in a syringe, drawing coloured water into the respirometer, noting its position, and recording movement at one-minute intervals for four minutes. The experiment is repeated with germinating bean B.

Identify the manipulated and responding variable in this experiment.

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Other parts of this question

  1. 1(a)(i)List THREE products of the link reaction.[3 marks]
  2. 1(a)(ii)State the site of the link reaction.[1 mark]
  3. 1(a)(iii)Identify the name and function of the structures labelled Q, R and S in Figure 1.[6 marks]
  4. 1(a)(iv)Complete the diagram below to identify the reduced molecules produced. You MUST include the arrows to show where the molecules were produced in the Kreb's…[5 marks]
  5. 1(b)(i)State a suitable hypothesis for the experiment.[2 marks]
  6. 1(b)(ii)State a suitable control for the experiment.[1 mark]
  7. 1(b)(iv)Using the data in Table 1, identify which of the two beans respired faster.[1 mark]
  8. 1(c)Explain the function of EACH of the following microorganisms in maintaining tropical rainforest ecosystems as self-sustaining units. You MUST present your…[9 marks]

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