Friday, 17 February 2012

5.5 Beer production

5.5 Understand the role of yeast in the production of beer



Beer is largely Ethanol (an alcohol molecule) which is produced from glucose.

Glucose --→ Ethanol + carbon dioxide (a form of anaerobic respiration)
- The microorganism that does this is Yeast which supply’s the enzymes

Ethanol is flavoured by plants such as Hops

Glucoses comes from starch
Starch ----(amylase ‘germination;)--→ Maltose ----(Maltose)---→ Glucose
The starch comes from things such as barley seeds, wheat seeds, and rice.

Yeast brings about the anaerobic respiration of glucose to ethanol and carbon dioxide

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