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

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

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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

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

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