Edexcel IGCSE Biology Biology Paper 2 January 2023 examiner report (4BI1/2BR)
Examiner report
- Q1 - 17 marks - Gas exchange, Limiting factors in photosynthesis, Mineral ions in plants, Root hair cells, Transpiration
- Q2 - 10 marks - Food tests, The kidney and the urinary system, Ultrafiltration and selective reabsorption
- Q3 - 9 marks - Abiotic and biotic factors, Biodiversity, Sampling and fieldwork
- Q4 - 8 marks - Genes and alleles, Protein synthesis
- Q5 - 11 marks - The human reproductive system, The menstrual cycle
- Q6 - 9 marks - Immunisation, Pathogens, The specific immune response
- Q7 - 6 marks - Micropropagation
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