Why is a control tube with glass beads used in a respirometer?

  1. To measure RQ directly
  2. To correct for changes in temperature and pressure
  3. To supply oxygen
  4. To absorb CO₂
Answer

B) To correct for changes in temperature and pressure

It compensates for physical changes. AS & A Level Biology · Topic 12 Energy and Respiration · 12.1 Energy

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