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

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

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Energy Release and Conservation
Organisms can synthesize ATP by oxidative phosphorylation when they

ferment
pass electrons to oxygen through an electron transport system containing cytochromes
oxidize glucose to pyruvate
pass electrons from the oxidation of chlorophyll through an electron transport system

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

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

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