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Biology · Edexcel 4BI1 · Biology Paper 1 · regional · January 2022

Edexcel IGCSE Biology Biology Paper 1 January 2022 examiner report (4BI1/1BR)

2h 110 marks

Examiner report

  1. Q1 - 9 marks - Energy in ecosystems, Natural selection, Pyramids of number, biomass and energy
  2. Q2 - 9 marks - The eye, The reflex arc
  3. Q3 - 11 marks - Anaerobic respiration, Cell structure, Classification, Factors affecting enzyme activity, Food production using micro-organisms
  4. Q4 - 15 marks - Digestion
  5. Q5 - 16 marks - Diet and nutrition, Food production using micro-organisms
  6. Q6 - 9 marks - The human reproductive system, The menstrual cycle
  7. Q7 - 10 marks - Monohybrid inheritance, Probability and ratios in genetic crosses, Selective breeding, Sex determination, The heart and circulation
  8. Q8 - 11 marks - Food tests, Limiting factors in photosynthesis, Photosynthesis
  9. Q9 - 7 marks - Air pollution, The greenhouse effect and climate change
  10. Q10 - 7 marks - Gas exchange, Ventilation and the thorax
  11. Q11 - 6 marks - Homeostasis