Is the regeneration of the oxidized carrier during fermentation accompanied by the production of adenosine triphosphate?
AYes, two molecules are made per turn
BYes, one molecule is made per turn
CNo, the regeneration makes none
DNo, but four are made in the chain
Answer & Solution
Correct answer: C. No, the regeneration makes none
1. Fermentation exists to regenerate the oxidized carrier so that glycolysis can keep running.
2. That regeneration is not accompanied by adenosine triphosphate production.
3. The potential of NADH to produce adenosine triphosphate using an electron transport chain is therefore not utilised.
4. Any adenosine triphosphate a fermenting cell gains comes from glycolysis itself, not from the fermentation step.
5. Options offering a per-turn yield confuse fermentation with substrate-level phosphorylation in glycolysis.
6. An option invoking the electron transport chain contradicts the very condition that makes fermentation necessary.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 7 "Cellular Respiration", section 7.5 Metabolism without Oxygen_
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