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In anaerobic condition sugar in dough is converted into?

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In anaerobic condition sugar in dough is converted into?

(a) Alcohol

(b) Water

(c) Glucose

(d) Sucrose

This question was posed to me in examination.

This question is from Oxygen Uptake in Cell Cultures in section Mass Transfer of Bioprocess Engineering

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Best answer
Right option is (a) Alcohol

The explanation is: Fermentation is nothing but an anaerobic respiration process in which the substrate is any organic material other than glucose like alcohol. Saccharomyces cerevisiae (yeast) produces an enzyme named zymogen  which ferment the alcohol. It is an anaerobic process and substrate is not glucose. The energy production is much less in fermentation process.

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