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Ale is produced using yeast described as

  • A.Top fermenting, working at warmer temperatures
  • B.Bottom fermenting, working at colder temperatures
  • C.Non-fermenting, acting only on the wort proteins
  • D.Filamentous, growing as a mat across the surface

Answer: A

Correct answer: Top fermenting, working at warmer temperatures

Ale yeast, Saccharomyces cerevisiae, works at 15 to 22 degrees and rises with the foam to the top of the vessel. The warmth encourages ester formation, which is why ales carry fruity notes that lagers do not. The fermentation is also quicker, finishing in days rather than weeks.

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