alleryThe maximum natural alcohol concentration in fermentation is limited because
AYeast cells get poisoned by ethanol
BSugar always runs out before ethanol
CTemperature kills the yeast first
DOxygen always returns to the medium
Answer & Solution
Correct answer: A. Yeast cells get poisoned by ethanol
Yeast cells poison themselves to death when ethanol reaches about 13 per cent.
Beverages with higher alcohol are obtained by distillation, which raises the alcohol fraction by selective vaporisation.
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