29. The aerated submerged bacterial fermentation to produce vitamin B12 employs strains of
A.Propionibacterium
B.Pseudomonas
C.Acetobacter
D.both (a) and (b)

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30. Which of the following is a heterofermentative micro-organism?
A.Leuconostoc mesenteroides
B.Lactobacillus delbrueckii
C.Lactobacillus bulgaricus
D.Lactobacillus pentose

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31. Riboflavin is a by-product of __________ fermentation carried out by Clostridium spp.
A.citric acid
B.acetone butanol
C.acetone butanol
D.ethanol

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32. Rickes et al. recovered active crystalline vitamin B12 from the culture of
A.Streptomyces griseus
B.Bacillus megaterium
C.Streptomyces olivaceus
D.Streptomyces lactis

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33. The rapid process of microbial oxidation developed to produce acetic acid from ethanol at Schutzenbach, Germany is also known as
A.packed generator
B.trickle method
C.Orleans process
D.both (a) and (b)

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34.  Which of the following micro organism utilizes lactose as a carbon source in production of lactic acid from whey media?
A.Lactobacillus bulgaricus
B.Lactobacillus delbrueckii
C.Lactobacillus pentosus
D.Leuconostoc mesenteroides

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35. The organism which utilizes the pentose of sulphite waste liquor for lactic acid production is
A.Streptococcus lactis
B.Lactobacillus bulgaricus
C.Lactobacillus casei
D.Lactobacillus pentosus

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