Multiple Choice
Which of the following is not associated with fermentation?
10. Anerobic Respiration
Fermentation
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The purpose of fermentation is to produce what?
A
ATP
B
NADH
C
NAD+
D
H2O
Verified step by step guidance1
Understand that fermentation is a metabolic process that occurs in the absence of oxygen (anaerobic conditions). It allows cells to regenerate NAD+ from NADH, which is crucial for glycolysis to continue.
Recall that during glycolysis, glucose is broken down into pyruvate, producing ATP and NADH. However, glycolysis requires a continuous supply of NAD+ to accept electrons.
Recognize that in the absence of oxygen, the electron transport chain cannot function to regenerate NAD+ from NADH. Therefore, cells use fermentation to regenerate NAD+.
In lactic acid fermentation, pyruvate is reduced to lactate, and in alcoholic fermentation, pyruvate is converted to ethanol and CO2. Both processes oxidize NADH back to NAD+.
Conclude that the primary purpose of fermentation is to regenerate NAD+ so that glycolysis can continue to produce ATP in anaerobic conditions.
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