Fermentation Lab
Hypothesis: Which test
tube will pop first?
Purpose: To identify a
common type of anaerobic
respiration.
Anaerobic Respiration
Both test tubes contain yeast
Test tube ‘A’ has grape juice in it.(sugar source)
Test Tube ‘B’ has water in it.
Both Test tubes are corked and you wait 45
minutes.
Grape Juice
Water
Yeast in both
Predict what will happen?
What will
happen?
Observation and Data:
You noticed:
1. Bubbles produced.
2. A noticeable odor.
3. Test Tube ‘A’ popped.
Grape Juice
Water
Yeast in both
Questions: Why?
What anaerobic reaction took place?
Draw the reaction.
Why is this reaction anaerobic?
What were the bubbles?
Why didn’t the reaction take place in both
test tubes?
(All answers must be in complete
sentences…)
“Alcoholic Fermentation”
+2 ATP
Glucose
Pyruvic
acid
Alcohol + CO2
4 ATP