plumiWhy we respire and the mitochondrion: OCR A‑Level Biology A questions
OCR A-Level Biology A past-paper questions on 5.2.2.1 Why we respire and the mitochondrion, 2016–2025, with mark schemes and examiner’s reports where available.
All papers
All years
Q16(a)(ii)
The whole paper ↗Loading the question…
Open the full PDFQ4(b)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ2(c)(iii)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ19(a)(ii)
The whole paper ↗Loading the question…
Open the full PDFQ19(b)
The whole paper ↗Loading the question…
Open the full PDFQ19(c)(ii)
The whole paper ↗Loading the question…
Open the full PDFQ19(c)(i)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDF
All 7 questions on Why we respire and the mitochondrion, as a list
- June 2025, Paper 1, Q16(a)(ii) (2 marks): Identify one similarity and one difference between the structures of chloroplasts and the structures of mitochondria. Similarity Difference [2]
- June 2024, Paper 3, Q4(b) (1 mark): Outline why cellular respiration is necessary in cells that are carrying out DNA replication. [1]
- June 2023, Paper 3, Q2(c)(iii) (1 mark): ATP is produced in respiration. Some of these molecules of ATP are used to release energy for processes in respiration. For example, ATP is used in the early st
- November 2020, Paper 1, Q19(a)(ii) (2 marks): Identify the structures labelled M and N in the photomicrograph. M N [2]
- November 2020, Paper 1, Q19(b) (2 marks): Describe two ways in which the structure of mitochondrial membranes is related to the function of a mitochondrion. 1 2 [2]
- November 2020, Paper 1, Q19(c)(ii) (3 marks): Explain why early eukaryotes were able to grow more quickly than cells that did not possess mitochondria. [3]
- June 2017, Paper 1, Q19(c)(i) (3 marks): Identify the structures labelled with the following letters: U W Z [3] ATP, FADH2 and hexose 1,6-bisphosphate are three organic products of respiration in sperm
Questions, mark schemes and examiner’s reports are © OCR, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? OCR A-Level Biology A past papers, or our free OCR-style practice pack.
The Plumi iPad app also offers exam-style questions with AI feedback on your handwritten working.