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4 marksCellular Respiration and ATP Synthesis

CAPE Biology Unit 2 · May/June 2026 · Paper 2 · Question 1(c)(iv)

Table 1 shows the results of an experiment which measured the oxygen consumption of yeast strains at different temperatures.

State TWO conclusions which can be made from the data given in Table 1. You MUST give a reason to support EACH conclusion.

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Other parts of this question

  1. 1(a)(i)On the diagram in Figure 1, insert the names of the FIVE intermediates shown.[5 marks]
  2. 1(a)(ii)Identify which TWO of the reactions, labelled W–Z, uses ATP.[2 marks]
  3. 1(a)(iii)State the total number of NADH and pyruvate molecules produced from a single glucose molecule during glycolysis.[2 marks]
  4. 1(b)(i)State THREE ways in which lactic acid fermentation and the method of anaerobic respiration shown in Figure 2 are similar.[3 marks]
  5. 1(b)(ii)State the name of the two-carbon molecule which is produced during oxidative decarboxylation of pyruvate.[1 mark]
  6. 1(c)(iii)On the grid provided on page 7, construct a bar graph that shows a comparison between both strains of yeast at the given temperatures.[5 marks]
  7. 1(c)Discuss TWO ways in which global warming may impact the mangrove ecosystem shown in Figure 3. You MUST present your response in complete paragraphs.[8 marks]

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