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Link reaction and Krebs cycle: Edexcel A‑Level Biology B questions

Every Edexcel A-Level Biology B exam question on 5.3 Link reaction and Krebs cycle, 2016–2025, with its mark scheme and examiner’s report.

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1,826 questions

  1. Q7(b)(i)

    October 2020 · Paper 1

    1 mark5.3 Link reaction and Krebs cycle
    The whole paper ↗
    October 2020 Paper 1, question 7(b)(i): Where in a cell does the conversion of pyruvate to acetyl coenzyme A take place? (1) A cytoplasm B matrix C stroma D tonoplast

  2. Q4(b)(i)

    June 2018 · Paper 1

    1 mark5.3 Link reaction and Krebs cycle
    The whole paper ↗
    June 2018 Paper 1, question 4(b)(i): When succinate is converted into fumarate, succinate is (1) A hydrolysed B oxidised C phosphorylated D reduced

  3. Q4(b)(ii)

    June 2018 · Paper 1

    4 marks5.3 Link reaction and Krebs cycle
    The whole paper ↗
    June 2018 Paper 1, question 4(b)(ii): Explain the role of the Krebs cycle. (4)
All 3 questions on Link reaction and Krebs cycle, as a list
  1. October 2020, Paper 1, Q7(b)(i) (1 mark): Where in a cell does the conversion of pyruvate to acetyl coenzyme A take place? (1) A cytoplasm B matrix C stroma D tonoplast
  2. June 2018, Paper 1, Q4(b)(i) (1 mark): When succinate is converted into fumarate, succinate is (1) A hydrolysed B oxidised C phosphorylated D reduced
  3. June 2018, Paper 1, Q4(b)(ii) (4 marks): Explain the role of the Krebs cycle. (4)

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