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Cambridge · O Level · Biology
October/November 2025 — Paper 2 · Variant 2.
7 structured questions · 20 marks
Download question paper (PDF)Mark scheme — for enrolled students
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Topics covered
- Effects of humans on ecosystems
- Temperature control
- Human digestive system
- Effects of temperature and pH
- Inheritance
- Sexual reproduction in humans
- Mammalian nervous system
Questions in this paper
- Q1aMammalian hormones5 marksincludes a figure
- Q1bCoordination and response in plants1 marks
- Q2a(ii)Temperature control3 marks
- Q2b(ii)Transpiration and translocation2 marksincludes a figure
- Q2b(i)Transpiration and translocation1 marks
- Q2b(iv)Transpiration and translocation1 marks
- Q2b(iii)Transpiration and translocation3 marks
- Q2a(i)Homeostasis2 marksincludes a figure
- Q3c(ii)Effects of humans on ecosystems3 marks
- Q3a(i)Features of organisms2 marksincludes a figure
- Q3dEcosystems and biodiversity3 marks
- Q3a(ii)Sexual reproduction in plants1 marks
- Q3bNutrient cycles3 marks
- Q3c(i)Nutrient cycles4 marks
- Q4b(i)Human digestive system1 marks
- Q4c(ii)Effects of temperature and pH3 marks
- Q4c(i)Effects of temperature and pH3 marksincludes a figure
- Q4aEnzyme action2 marks
- Q4b(ii)Human digestive system2 marks
- Q5c(i)Inheritance1 marks
- Q5c(ii)Sexual reproduction in humans3 marks
- Q5bInheritance4 marksincludes a figure
- Q5a(i)Blood5 marksincludes a figure
- Q5a(ii)Blood2 marks
- Q6a(ii)Disease3 marks
- Q6b(i)Disease4 marks
- Q6b(ii)Diffusion and osmosis2 marksincludes a figure
- Q6a(i)Disease1 marks
- Q7bMammalian nervous system6 marksincludes a figure
- Q7aSpecialised cells, tissues and organs4 marks
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