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FERMENTATION
Fermentation is an anaerobic process where glucose undergoes
glycolysis and produces a small amount of ATP. Cells performed
anaerobic fermentation long before aerobic cellular respiration occurred.
Bacteria, fungi and yeast ferment a wide variety of carbohydrates to
make yogurt, kefir, kimchi, sourdough, pickles, wine and beer.
There are two main fermentation processes. Lactic acid fermentation
makes a sour tasting product. This acid was historically used to preserve
food before refrigeration. Alcohol fermentation produces carbon
dioxide bubbles which can make closed bottles explode. Both
fermentation processes produce only 2 ATP net for each glucose
compared to 36 net glucose for aerobic respiration.
FERMENTATION
FERMENTATION
Fermentation is an __________________________________________________________
_____________________________________________________. Cells performed anaerobic
fermentation long before aerobic cellular respiration occurred.
Bacteria, fungi and yeast ferment a wide variety of __________________ to make yogurt, kefir,
kimchi, sourdough, pickles, wine and beer.
There are two main fermentation processes. ___________ ______________makes a sour tasting
product. This acid was historically used to preserve food before _________________________.
______________________ produces _________________________________ which can make
closed bottles explode. Both fermentation processes produce only ______________________
____________________________________________________________________________
_____________________________________________________ .
Lactic Acid Fermentation
Read p 78 – 80 MHR text.
1. Where and when does the
reaction shown in the diagram
occur?
2. Name the reactant.
3. Name the first process.
4.a) List the 3 products of
the first process.
b)
Explain what happens to each of the three products.
5.a)
What happens to the coenzyme when pyruvate is converted to lactate?
b)
Why is this step crucial to lactic acid fermentation?
6.
Describe what happens in muscle cells when oxygen is available.
Alcohol Fermentation
1. Where is this reaction
occurring?
2. Name the reactant.
3. Name the first process.
4.a) List the 3 products of
the first process.
b) Explain what happens to each of the three products.
5. Name the process that occurs when pyruvate is converted to acetaldehyde.
6.a) Name the process that occurs when acetaldehyde is converted to ethanol.
b) Why is this step crucial to alcohol fermentation?
7. Bonus: What is the maximum alcohol concentration that can be produced with
this fermentation?