0654.B12.1.02 — Describe aerobic respiration as the chemical reactions in cells that use oxygen to break down nutrient molecules to release energy: past paper questions
Real questions on 0654.b12.1.02 — describe aerobic respiration as the chemical reactions in cells that use oxygen to break down nutrient molecules to release energy
The newest 13 of 13 written questions. Open one to see it on the real paper.
- 0973/41 · October/November 2025 · Q2b(i)[2]
State the balanced symbol equation for aerobic respiration.
See it on the paper → - 0973/31 · May/June 2025 · Q3b(i)[2]
State the word equation for aerobic respiration. (i)
See it on the paper → - 0973/41 · May/June 2024 · Q10a(ii)[2]
State the balanced chemical equation for process B in Fig. 10.1.
See it on the paper → - 0973/31 · October/November 2023 · Q4b(i)[2]
State the two reactants in aerobic respiration.
See it on the paper → - 0973/31 · October/November 2023 · Q4b(ii)[2]
Suggest why the rate of respiration increases during exercise.
See it on the paper → - 0973/41 · October/November 2023 · Q4b[3]
Describe three ways that aerobic respiration is different from anaerobic respiration in humans.
See it on the paper → - 0973/42 · May/June 2023 · Q7b(ii)[2]
Explain how death of producers in rivers reduces the oxygen concentration in the water.
See it on the paper → - 0973/42 · May/June 2023 · Q10a(iii)[2]
Mitochondria are the site of aerobic respiration. Suggest why part Y in Fig. 10.1 contains many mitochondria.
See it on the paper → - 0973/31 · October/November 2021 · Q1e[2]
Explain why muscle cells need high rates of respiration.
See it on the paper → - 0973/41 · May/June 2021 · Q1a[4]
Table 1.1 shows some features of aerobic and anaerobic respiration. Place ticks (3) in the boxes to show all the correct features for each type of respiration. Table 1.1 type of respiration oxygen is a reactant glucose is a reactant lactic acid is a product carbon dioxide is a product aerobic anaerobic respiration in m...
See it on the paper → - 0973/31 · May/June 2020 · Q10c(ii)[1]
State why respiration is needed for muscle contraction.
See it on the paper → - 0973/41 · October/November 2019 · Q1b[1]
Describe one advantage of using aerobic respiration rather than anaerobic respiration.
See it on the paper → - 0973/42 · May/June 2019 · Q13a(ii)[3]
Explain why the death of producers eventually leads to the death of the fish in the lake.
See it on the paper →
What examiners said
Some candidates were able to give the equation but it was very common to see reactants and products reversed or the equation for photosynthesis given.
— Examiner report, May/June 2025, 0973/31 Q3(b)(i) (Cambridge)
Most candidates realised that one difference between aerobic respiration and anaerobic respiration is that only aerobic respiration requires oxygen. Some candidates wrote about aerobic respiration releasing more energy or not having lactic acid as one of the products. Other differences were not as well known. A few candidates thought that anaerobic respiration in humans has ethanol as one of the p...
— Examiner report, October/November 2023, 0973/41 Q4(b) (Cambridge)
Some candidates did not answer this question in terms of the context of eutrophication. Candidates should be reminded to read all the stimulus material provided and tailor their responses to the context in which the question is placed. Candidates that recognised that the decomposition of producers by aerobic bacteria would increase the removal of dissolved oxygen generally scored full marks.
— Examiner report, May/June 2023, 0973/42 Q7(b)(ii) (Cambridge)
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