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Which is true of both wine and beer fermentation?

  • A.Yeast converts sugar to ethanol and carbon dioxide
  • B.Bacteria carry out the primary conversion in each
  • C.The process requires a plentiful supply of oxygen
  • D.The raw material contains no fermentable sugar

Answer: A

The central conversion is the same in both, performed by Saccharomyces under anaerobic conditions. Where they differ is in how the sugar is obtained, since barley must be malted and mashed while grapes supply it directly.

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