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Biology · Edexcel 4BI1 · Biology Paper 1 · regional · January 2023

Edexcel IGCSE Biology Biology Paper 1 January 2023 examiner report (4BI1/1BR)

2h 110 marks

Examiner report

  1. Q1 - 7 marks - Gas exchange, Ventilation and the thorax
  2. Q2 - 7 marks - Pathogens, Photosynthesis
  3. Q3 - 10 marks - Ecosystems, Energy in ecosystems, Pyramids of number, biomass and energy
  4. Q4 - 10 marks - Diet and nutrition, Enzymes, Food tests
  5. Q5 - 13 marks - Increasing crop yield
  6. Q6 - 7 marks - Blood, Hormones and the endocrine system, Tropisms
  7. Q7 - 12 marks - Pollination and fertilisation in plants, Sexual and asexual reproduction
  8. Q8 - 14 marks - Monohybrid inheritance, Probability and ratios in genetic crosses, Selective breeding, Sex determination, The reflex arc
  9. Q9 - 10 marks - Blood vessels, Coronary heart disease, The heart and circulation
  10. Q10 - 12 marks - Limiting factors in photosynthesis, Photosynthesis
  11. Q11 - 8 marks - Factors affecting enzyme activity, Genetic engineering