Industrially Useful Microbial Processes
Which of the following microorganism produces only L(+) - lactic acid without further racemization ?

Leuconostoc mesenteroides
Rhizopus oryzae
Lactobacillus bulgaricus
Lactobacillus delbrueckii

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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

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

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