Microbiology - Industrially Useful Microbial Processes - Discussion

Discussion Forum : Industrially Useful Microbial Processes - Section 1 (Q.No. 53)
53.
The early assay employed for measuring penicillin activity were based upon the quantity required to prevent growth of S. aureus over
20 mm diameter zone using the cylinder plate method of assay
24 mm diameter zone using the cylinder plate method of assay
200 mm diameter zone using the cylinder plate method of assay
None of the above
Answer: Option
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