Respiration in Yeast
CO₂ Production in Different Sugar Solutions
Observe how yeast cells respire differently in various sugar solutions, producing carbon dioxide gas at different rates. The balloons will inflate as CO₂ gas is produced through respiration.
Glucose Solution
Sucrose Solution
No Sugar
Time: 0 min
Observation:
The experiment demonstrates how different sugar solutions affect yeast respiration. CO₂ production is indicated by balloon inflation and bubble formation.
Yeast Respiration Process
1. Glucose Solution (Left):
Yeast respires glucose most efficiently: C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + Energy. Expect fastest CO₂ production.
2. Sucrose Solution (Middle):
Yeast must first break sucrose into glucose and fructose, so CO₂ production is slower initially.
3. No Sugar (Right):
Control condition shows minimal CO₂ production since yeast lacks sugar substrate for respiration.
