Industrially Useful Microbial Processes – Section 2

26. Which of the following species is used for vitamin B12 production by fermentation process?

A. Streptomyces griseus
B. Streptomyces olivaceus
C. Bacillus megaterium
D. All of these

Correct Answer: D. All of these

27. The malt used to ferment beer is prepared by

A. roasting barley
B. washing the barley with water and drying it in air
C. soaking barley in water followed by germination and drying
D. treating barley with bovine amylase followed by roasting

Correct Answer: C. soaking barley in water followed by germination and drying

28. Penicillin was first produced commercially using

A. stationary mat culture
B. deep tank aerated fermentations
C. continuous fermentation
D. none of the above

Correct Answer: A. stationary mat culture

29. 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

Correct Answer: B. Penicillium chrysogenum (Q-176)

30. The medium utilized for fungal citric acid production should be deficient in

A. phosphate
B. manganese
C. iron
D. all of these

Correct Answer: D. all of these

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