5.5 beer production

understand the role of yeast in the production of beer.


-beer is largely ethanol (an alcohol molecule) and this is produced form glucose and it is broken down into CO2 and ethanol (anaerobic respiration) sometimes called fermentation respiration.
-the microorganism that does this is yeast. yeast is able to supply the enzyme to bring about the conversion. that is where the alcohol in beer comes from.
-the ethanol is flavoured by the plants such as hops to change the flavour.
-the glucose comes from starch. starch ---amylase---> maltose --maltase--> glucose
-starch comes from (sources) barley seeds, wheat seeds, rice (beers in asia)
-starch is broken into amylase by the process of malting. (germination of seeds)