Industrially Useful Microbial Processes

 

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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.

 

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