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Leuconostoc mesenteroides is described as heterofermentative, which means it produces

  • A.Ethanol and acetic acid but no lactic acid
  • B.Carbon dioxide and hydrogen but no acid
  • C.Lactic acid, acetic acid and carbon dioxide
  • D.Lactic acid and nothing else worth measuring

Answer: C

A heterofermentative organism yields a mixture, here lactic acid together with acetic acid, ethanol and carbon dioxide. The gas flushes oxygen from the vat and the acetic acid contributes to flavour, which is why the early phase matters to the final product even though it is brief.

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