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The yeast used to brew lager is

  • A.Zygosaccharomyces bailii
  • B.Saccharomyces pastorianus
  • C.Saccharomyces cerevisiae
  • D.Brettanomyces bruxellensis

Answer: B

Correct answer: Saccharomyces pastorianus

Lager is brewed with Saccharomyces pastorianus, a hybrid of S. cerevisiae with the cold-tolerant S. eubayanus. It ferments at 8 to 14 degrees and settles to the bottom, producing few esters and so the clean character lager is valued for. S. cerevisiae is the ale yeast, while Brettanomyces and Zygosaccharomyces are spoilage organisms.

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