Edexcel IGCSE Biology Biology Paper 1 June 2023 examiner report (4BI1/1B)
Examiner report
- Q1 - 8 marks - Pathogens
- Q2 - 13 marks - Energy in ecosystems, Pyramids of number, biomass and energy, Sampling and fieldwork
- Q3 - 12 marks - Cell structure, Eukaryotic and prokaryotic cells, Osmosis, Rate of diffusion, Transport in and out of cells
- Q4 - 14 marks - The reflex arc
- Q5 - 14 marks - Blood, The specific immune response
- Q6 - 14 marks - Monohybrid inheritance, Probability and ratios in genetic crosses
- Q7 - 13 marks - Factors affecting enzyme activity
- Q8 - 12 marks - Anaerobic respiration, Food production using micro-organisms
- Q9 - 10 marks - Genetic engineering
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