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Wize University Biology Textbook > Cellular Respiration

Fermentation

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Fermentation

Fermentation occurs when oxygen is not present.
  • Ethanol fermentation is used by anaerobic prokaryotes and yeast. NADH is oxidized back to NAD+ so that it can be recycled in another round of glycolysis. The NAD+ is needed to keep glycolysis running. The product is ethanol.
  • Lactic acid fermentation is used by humans and other mammals. NADH is oxidized back to NAD+ just like in alcohol fermentation. The product is lactic acid. Compared to oxidative phosphorylation, it is inefficient. Example: You might have experienced exercise fatigue. This is thought to be due partly to the production of lactic acid in the muscle. It occurs when the muscle needs more oxygen to keep functioning than is available at the moment, so it starts producing lactic acid as a way to get energy from glycolysis.

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Practice: Production of Acetaldehyde

is a byproduct of turning pyruvate into acetaldehyde during fermentation.

Practice: Alcohol Fermentation

Which statement is TRUE about alcohol fermentation?

Practice: Lactate Fermentation

What statement is FALSE about the lactate?
Extra Practice
Lactate: Similar to 2014 Question 24
What statement is FALSE about the lactate?
Using what you learned over all the lessons on metabolism, match the overall reaction with the process.
How many molecules of lactate can be produced form one glucose molecule?
Femermentation (Similar to 2018 Question 28)
How many molecules of ethanol would be produced from the fermentation of the disaccharide sucrose?
Practice
Which of the following is a metabolic pathway shared by both cellular respiration and fermentation?
Lactate: Similar to 2014 Question 24
What statement is FALSE about the lactate?
How many ATP molecules are produced per glucose molecule under anaerobic conditions?
How is ATP produced during fermentation? (Looking for the process name not the actual mechanism)
The metabolic pathway shared by both cellular respiration and fermentation is
Femermentation (Similar to 2018 Question 28)
How many molecules of ethanol would be produced from the fermentation of the disaccharide sucrose?
Fermentaion (Similar to 2018 Question 24)
Which statement is TRUE about alcohol fermentation?
Explain why anaerobic fermentation occurs and how it is necessary for ATP production in the absence of oxygen.
How many molecules of lactate can be produced form one glucose molecule?
Using what you learned over all the lessons on metabolism, match the overall reaction with the process.
Fermentation
Carbon Dioxide (CO2)
is a byproduct of turning pyruvate into acetaldehyde during fermentation
Lactic acid fermentation produces 2
Lactate
[do not make answer plural]
What metabolic pathways generate ATP to be used during cruising activity versus burst activity?
Practice: Lactate Fermentation
What statement is FALSE about the lactate?
Practice: Alcohol Fermentation
Which statement is TRUE about alcohol fermentation?
A human cell is no longer exposed to oxygen. Which of the following will take place?
Practice: Carbohydrate Metabolism
What is the term for anaerobic glucose breakdown?
How does fermentation allow glycolysis to continue in the absence of oxygen?
Fill in the blanks: Fermentation is ________________ and generates _______________
in humans and __________________ in yeast.
During which of the following process is ATP produced?
How is NAD+ regenerated for glycolysis when no oxygen is available in mammals?
Lactate Generation: Similar to 2014 Question 24
What cofactor and enzyme is necessary for the reaction converting acetylaldehyde to ethanol?