Industrially Useful Microbial Processes
During fermentation, pyruvic acid is converted into organic products such as

ethyl alcohol and lactic acid
glucose and fructose
starch and cellulose
citric acid and isocitric acid

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Industrially Useful Microbial Processes
The early assay employed for measuring penicillin activity were based upon the quantity required to prevent growth of S. aureus over

200 mm diameter zone using the cylinder plate method of assay
None of these
20 mm diameter zone using the cylinder plate method of assay
24 mm diameter zone using the cylinder plate method of assay

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