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31. Riboflavin is a by-product of __________ fermentation carried out by Clostridium spp.
A. citric acid
B. acetone butanol
C. streptomycin
D. ethanol
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
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)
34. Which of the following microorganism utilizes lactose as a carbon source in the production of lactic acid from whey media?
A. Lactobacillus bulgaricus
B. Lactobacillus delbrueckii
C. Lactobacillus pentosus
D. Leuconostoc mesenteroides
35. The organism which utilizes the pentose of sulfite waste liquor for lactic acid production is
A. Streptococcus lactis
B. Lactobacillus bulgaricus
C. Lactobacillus casei
D. Lactobacillus pentosus
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