In a respirometer, potassium hydroxide is used to

  1. provide oxygen
  2. absorb oxygen
  3. kill the seeds
  4. absorb carbon dioxide
Answer

D) absorb carbon dioxide

KOH absorbs CO₂ so fluid movement shows O₂ uptake. AS & A Level Biology · Topic 12 Energy and Respiration · 12.1 Energy

Biology MCQ · More A Level Biology: Energy and respiration MCQs · Practise