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Cambridge · O Level · Biology

October/November 2020 — Paper 3 · Variant 1.

16 structured questions · 36 marks

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

The mark scheme comes with the Biology course.

Topics covered

  • Enzymes
  • Human gas exchange
  • Features of organisms
  • Effects of temperature and pH

Questions in this paper

  • Q1a(i)Enzymes2 marks
  • Q1b(iii)Enzymes1 marks
  • Q1b(iv)Enzymes1 marks
  • Q1dEffects of temperature and pH5 marks
  • Q1a(iv)Effects of temperature and pH2 marks
  • Q1b(ii)Effects of temperature and pH1 marks
  • Q1cEnzymes2 marks
  • Q1b(i)Effects of temperature and pH1 marks
  • Q1a(iii)Enzymes4 marks
  • Q1a(ii)Enzymes1 marks
  • Q2aHuman gas exchange4 marksincludes a figure
  • Q2bHuman gas exchange2 marks
  • Q2dHuman gas exchange1 marks
  • Q2cHuman gas exchange1 marks
  • Q3a(ii)Features of organisms3 marks
  • Q3a(i)Features of organisms5 marksincludes a figure

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