Discussion
The two main products of the alcoholic fermentation of sugar by yeast are
Answer: B
Correct answer: Ethanol and carbon dioxide
Under anaerobic conditions yeast converts each molecule of glucose to two of ethanol and two of carbon dioxide: \[ \mathrm{C_6H_{12}O_6 \rightarrow 2\,C_2H_5OH + 2\,CO_2}. \] The ethanol is what preserves the drink and the carbon dioxide is what carbonates it or, in a still wine, is simply allowed to escape.
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