Yeast and Making Beer

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When yeast respires anaerobically, sugar is turned into alcohol and CO2

Glucose ==> Ethanol + Carbon Dioxide

  • Get the sugar out of the grain

1)     Beer is made from grain – usually barley

2)     The barley grains are allowed to germinate for a few days, during which the starch in the grains is broken down into sugar by enzymes. Then the grains are dried in a kiln. This is called malting

3)     The malted grain is mashed up and water is added to produce a sugary solution with lots of bits in it. This is then sieved to remove the bits



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