User's Manual

PASPort Dissolved Oxygen Sensor Model No. PS-2108
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8. Stop recording and save the data.
Questions
1. What is the evidence that the yeast cells are alive and respiring during the experiment?
2. What happens to the yeast cells when the dissolved O2 concentration reaches zero? (Hint:
Look carefully at the beaker that contains the concentrated yeast solution and think about
how yeast is used in industry.)