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magnusson 12a

microorganisms

QuestionAnswer
how does pickling kill microorganisms this uses an acid pH to kill microorganisms by denaturing their enzymes and other proteins
how does cooking prevent and kill microgorganisms? the heat denatures enzymes and other proteins and kills microorganisms
what do drying, salting and coating in sugar do to prevent food spoilage? they dehydrate any microorganisms as water leaves them by osmosis
how does smoking prevent food spoilage? the food develops a hardened, dry outer surface and smoke contains antibacterial chemicals
how does irradiation destroy microorganisms? ionising radiation kills the microorganisms by disrupting their DNA structure
how does cooling and freezing prevent food spoilage? these do not kill microorganisms, but retard enzyme activity so their metabolism, growth and reproduction is very slow
Created by: emmjones
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