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Cambridge · O Level · Biology

May/June 2025 — Paper 2 · Variant 2.

25 structured questions · 61 marks

Download question paper (PDF)Mark scheme — for enrolled students

The mark scheme comes with the Biology course.

Topics covered

  • Human gas exchange
  • Energy flow
  • Diet
  • Transpiration and translocation
  • Effects of temperature and pH
  • Immunity
  • Features of organisms
  • Nutrient cycles
  • DNA
  • Antibiotics
  • Effects of humans on ecosystems
  • Sexual reproduction in plants
  • Coordination and response in plants
  • Cell structure and function
  • Selection
  • Biotechnology

Questions in this paper

  • Q1aSexual reproduction in plants3 marks
  • Q1c(ii)Coordination and response in plants2 marks
  • Q1bSexual reproduction in plants5 marksincludes a figure
  • Q1c(i)Sexual reproduction in plants1 marksincludes a figure
  • Q2cEnergy flow2 marks
  • Q2b(i)Diet2 marks
  • Q2a(i)Diet3 marksincludes a figure
  • Q2dEffects of humans on ecosystems3 marks
  • Q2a(ii)Diet2 marks
  • Q2b(ii)Diet2 marks
  • Q3a(iii)Immunity3 marks
  • Q3b(i)Antibiotics1 marksincludes a figure
  • Q3a(ii)Cell structure and function2 marks
  • Q3c(ii)Selection5 marks
  • Q3a(i)Cell structure and function2 marksincludes a figure
  • Q3b(ii)Antibiotics2 marksincludes a figure
  • Q3c(i)Selection1 marksincludes a figure
  • Q4a(i)Human gas exchange3 marksincludes a figure
  • Q4b(i)Human gas exchange3 marks
  • Q4a(ii)Human gas exchange2 marksincludes a figure
  • Q4b(ii)Circulatory system1 marks
  • Q5b(ii)Effects of temperature and pH1 marksincludes a figure
  • Q5b(i)Effects of temperature and pH4 marksincludes a figure
  • Q5a(ii)Features of organisms2 marks
  • Q5a(iii)Nutrient cycles4 marks
  • Q5b(iii)Biotechnology1 marks
  • Q5a(i)Concept and use of a classification system1 marks
  • Q6a(i)DNA1 marksincludes a figure
  • Q6a(ii)DNA1 marksincludes a figure
  • Q6a(iii)DNA1 marks
  • Q6bDNA4 marks
  • Q7bTranspiration and translocation4 marks
  • Q7aLeaf structure6 marks

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