Lab Exercise #9: Fermentation Flashcards
Aerobic Respiration
Glucose is broken down into 2 pyruvic acids, yielding a net of 2 ATP with plenty of oxygen present
Anaerobic Respiration
Does not require any oxygen
Alcohol Fermentation
Convert pyruvic acid molecules into molecules of ethanol, resulting in the release of CO2.
Does not produce any ATP.
Regenerates the coenzyme NAD+ from NADH
Glycolysis
Glucose is broken down into two pyruvic acids, yielding a net of 2 ATP. “sugar splitting”
Chemical Equation of Glycolysis
Glucose —> Pyruvate
Chemical Equation of Alcohol Fermentation
Pyruvate —> Alcohol (ethanol)/CO2
Which step do cellular respiration an fermentation share?
Glycolysis
What are the products of Alcohol fermentation?
CO2 and Ethanol
Which of the following had the faster rate of fermentation?
a) . fructose + heat
b) . starch + diastase + heat
c) . Starch + heat
fructose + heat
Which of the following had the faster rate of fermentation?
a) . fructose + heat
b) . fructose without heat
fructose + heat
Which of the following had the faster rate of fermentation?
a) . starch + diastase + heat
b) . starch + heat
Starch + diastase + heat
Explanation of the faster rate
Fructose is a simple sugar and is able to break down easier
The heat allowed the molecules to move faster, allowing it to also react faster
Diastase is able to break starch down
What is the name of the tubes used?
Fermentation Tubes
What gas was collected at the top of the tubes?
CO2 - Carbon Dioxide Gas
Why add yeast when baking bread?
Yeast ferments the sugar in dough and produces CO2 bubbles that causes the dough to rise
