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Biology A · OCR H420 · Biological Processes · June 2025

OCR A Level Biology A Biological Processes June 2025 examiner report (H420/01)

2h 15m 100 marks

Examiner report

  1. Q1 - 1 mark
  2. Q2 - 1 mark - Proteins
  3. Q3 - 1 mark - Enzymes
  4. Q4 - 1 mark - Biological molecules
  5. Q5 - 1 mark
  6. Q6 - 1 mark
  7. Q7 - 1 mark
  8. Q8 - 1 mark
  9. Q9 - 1 mark - Ventilation and the thorax
  10. Q10 - 1 mark - Ventilation and the thorax
  11. Q11 - 1 mark - Plant hormones
  12. Q12 - 1 mark
  13. Q13 - 1 mark
  14. Q14 - 1 mark - Limiting factors in photosynthesis
  15. Q15 - 1 mark - Limiting factors in photosynthesis
  16. Q16 - 15 marks - Aerobic respiration, Photosynthesis
  17. Q17 - 15 marks - Factors affecting enzyme activity
  18. Q18 - 13 marks - Plant hormones
  19. Q19 - 14 marks - Factors affecting enzyme activity, Limiting factors in photosynthesis
  20. Q20 - 16 marks - Control of heart rate, The heart and circulation
  21. Q21 - 12 marks - Gas exchange, Haemoglobin and oxygen transport, Proteins, The heart and circulation