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CAIE A-Level Biology 12.1.7 Respirometer Investigations

Practise measuring oxygen uptake with CO₂ absorbent and manometer displacement, converting distance to volume and controlling mass, temperature, time and pressure.

Syllabus
2028–2030
Course
Biology 9700
Level
A2

Exam points

  • use soda lime or potassium hydroxide to remove carbon dioxide from respired gas
  • convert manometer displacement through capillary dimensions into oxygen volume
  • include a control and standardise organism mass, temperature, time and apparatus pressure

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