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1 markCellular Respiration and ATP Synthesis

CAPE Biology Unit 2 · May/June 2024 · Paper 2 · Question 1(a)(ii)

Glucose is catabolized by glycolysis in the cytosol, producing pyruvate. Two carbons from pyruvate enter the Kreb's cycle via the link reaction.

State the site of the link reaction.

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  1. 1(a)(i)List THREE products of the link reaction.[3 marks]
  2. 1(a)(iii)Identify the name and function of the structures labelled Q, R and S in Figure 1.[6 marks]
  3. 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]
  4. 1(b)(i)State a suitable hypothesis for the experiment.[2 marks]
  5. 1(b)(ii)State a suitable control for the experiment.[1 mark]
  6. 1(b)(iii)Identify the manipulated and responding variable in this experiment.[2 marks]
  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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