Industrially Useful Microbial Processes – Section 2

41. The precursor used for the production of vitamin B12 by Streptomyces olivaceus is

A. cobalt chloride
B. cobalt sulfate
C. calcium chloride
D. calcium sulfate

Correct Answer: A. cobalt chloride

42. Most biopolymers produced by micro-organisms are

A. cell wall constituents
B. nucleic acids
C. histones
D. exopolysaccharides

Correct Answer: D. exopolysaccharides

43. Microbial rennet, which is used in cheese manufacture is produced by

A. Mucor spp
B. Aspergillus spp
C. Bacillus spp
D. Saccharomyces spp

Correct Answer: B. Aspergillus spp

44. Production of L-lysine can be carried out by

A. C. glutamicum
B. B. flavum FA 1-30
C. B. flavum
D. All of these

Correct Answer: D. All of these

45. The citric acid is recovered from the fermentation broth as

A. calcium citrate
B. magnesium citrate
C. zinc citrate
D. none of these

Correct Answer: A. calcium citrate

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