Industrially Useful Microbial Processes – Section 1

26. The submerged fermentation of vinegar utilizes special fermentor designs known as

A. acetator
B. cavitator
C. packed vinegar generator
D. both (a) and (b)

Correct Answer: D. both (a) and (b)

27. The major organism used in the microbial production of citric acid is

A. Penicillium notatum
B. Rhizopus nigrificins
C. Aspergillus niger
D. Lactobacillus delbrueckii

Correct Answer: C. Aspergillus niger

28. Which of the following organism is utilized for the production of D-L-alanine?

A. Microbacterium ammoniaphilum
B. Brevibacterium flavum
C. Arthrobacter paraffineus
D. C. glutamicum

Correct Answer: A. Microbacterium ammoniaphilum

29. The aerated submerged bacterial fermentation to produce vitamin B12 employs strains of

A. Propionibacterium
B. Pseudomonas
C. Acetobacter
D. both (a) and (b)

Correct Answer: D. both (a) and (b)

30. Which of the following is a heterofermentative micro-organism?

A. Leuconostoc mesenteroides
B. Lactobacillus delbrueckii
C. Lactobacillus bulgaricus
D. Lactobacillus pentose

Correct Answer: B. Lactobacillus delbrueckii

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