# Industrially Useful Microbial Processes

## Industrially Useful Microbial Processes

 Question 1
The citric acid is recovered from the fermentation broth as
 A calcium citrate B magnesium citrate C zinc citrate D none of these

 Question 2
Protease, which is used for flavouring of sake and haze removal in sake is produced by
 A oryzae B flavus C cereus D niger

 Question 3
The first commercial fermention carried out to obtain L-lysine is known as
 A dual fermentation B indirect fermentation C direct fermentation D both (a) and (b)

 Question 4
Which of the following is known for greater stability of the riboflavin producing capacity?
 A Eremothecium ashbyii B Ashbya gossypii C Candida flareri D None of these

 Question 5
The early assay employed for measuring penicillin activity were based upon the quantity required to prevent growth of S. aureus over
 A 20 mm diameter zone using the cylinder plate method of assay B 24 mm diameter zone using the cylinder plate method of assay C 200 mm diameter zone using the cylinder plate method of assay D None of the above

 Question 6
The present day high yielding penicillin are obtained from
 A Penicillium chrysogenum (NRRL, 1951) B Penicillium chrysogenum (Q-176) C Penicillium chrysogenum (Q-179) D none of the above

 Question 7
The production of alcohol from lactose of whey is generally carried out by
 A Saccharomyces cerevisiae B Candida pseudotropicalis C Candida utilis D none of these

 Question 8
The precursor used for production of vitamin B$_{12}$ by Streptomyces olivaceus is
 A cobalt chloride B cobalt sulphate C calcium chloride D calcium sulphate

 Question 9
Fungal amylases using stationary culture with wheat bran utilizes
 A oryzae B niger C flavus D S. cerevisiae

 Question 10
An "International Unit" of penicillin activity established in 1944 is amount of penicillin equivalent to
 A 0.6 micrograms of crystalline penicillin G of about 98 % purity B 0.6 micrograms of crystalline penicillin F of about 98 % purity C 0.8 micrograms of crystalline penicillin G of about 98 % purity D 0.8 micrograms of crystalline penicillin G of about 90 % purity
There are 10 questions to complete.