EQUATION FOR ANAEROBIC RESPIRATION (YEAST):
Glucose → Ethanol + Carbon Dioxide
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EXPERIMENT:
INVESTIGATING CARBON DIOXIDE PRODUCTION BY YEAST
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Diagram showing Carbon Dioxide Production by Yeast
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METHOD:
Mix Yeast with Sugar Solution in a Boiling Tube with a Layer of Oil to Prevent Oxygen from Entering (Prevents Aerobic Respiration)
Connect this Boiling Tube with A Test Tube of Limewater using a Capillary Tube and Enclose with a Bung
Place Boiling Tube with Yeast and Sugar Solution into Water Bath at Set Temperature and Count the Number of Bubbles Produced in Fixed Time
Change Temperature of Water Bath and Repeat
Compare Results at Different Temperatures
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RESULTS:
Higher the Temperature, the More Bubbles of Carbon Dioxide will be Produced as Higher Temperatures will be Closer to Optimum Temperature of Enzymes in Yeast, Increasing Enzyme Activity
As Enzyme Activity Increases, Rate of Anaerobic Respiration will Increase
But if Temperature is Too High, Enzymes will Denature causing Carbon Dioxide Production to Stop
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short and straight to the point.
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