Energy Release and Conservation
Which of the following best explains about the usefulness of the production of ethanol in yeast cells under anaerobic conditions?

Yeast would be unable to activate the enzymes of the Krebs cycle without ethanol
Ethanol keeps the electron transport system functioning
The process generates oxygen, which is required for glycolysis
The process regenerates NAD+, which is required for glycolysis

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Energy Release and Conservation
Which of the following is the most complete definition of fermentation?

Oxidation of glucose with organic molecules serving as electron acceptors
Production of ethyl alcohol from glucose
Production of energy by substrate-level phosphorylation
Complete catabolism of glucose to CO2 and HO2

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