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PAG 12: Respiration Rates

Investigate the rate of respiration in organisms using a respirometer

Required PracticalOCRA-Level

๐Ÿ”ฌ Equipment Required

  • Respirometer
  • Germinating seeds or invertebrates
  • Soda lime
  • Cotton wool
  • Water bath
  • Thermometer
  • Stopwatch
  • Syringe

๐Ÿฆบ Safety Precautions

  • Soda lime is corrosive - do not touch
  • Handle organisms carefully
  • Wash hands after practical

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About PAG 12: Respiration Rates

PAG 12: Respiration Rates is a required practical for OCR A-Level Biology. This practical investigate the rate of respiration in organisms using a respirometer

Students are expected to understand the method, identify and control variables, use appropriate equipment, analyse results, draw graphs, identify sources of error, suggest improvements, and consider safety precautions.

Questions on required practicals frequently appear in OCR A-Level Biology exams and can be worth significant marks. Practice with our AI-generated questions to master this practical.

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