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Industrially Useful Microbial Processes

Industrially Useful Microbial Processes
The enzyme which converts optically active isomers of lactic acid to the optically inactive racemic mixture is

racemase
invertase
isomerase
dehydrogenase

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Industrially Useful Microbial Processes
The major organism used in the microbial production of citric acid is

Rhizopus nigrificins
Lactobacillis delbrueckii
Aspergillus niger
Penicillin notatum

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Industrially Useful Microbial Processes
Which of the following is a heterofermentative micro-organism?

Lactobacillus pentose
Lactobacillus bulgaricus
Leuconostoc mesenteroides
Lactobacillus delbrueckii

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Industrially Useful Microbial Processes
Riboflavin is a by-product of __________ fermentation carried out by Clostridium spp.

citric acid
ethanol
streptomycin
acetone butanol

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Industrially Useful Microbial Processes
Which of the following when used in proper concentration stimulates the Ascomycetes fermentation of vitamin B12 and can be used to counteract toxicity of iron in Candida species?

Ca
Zn
Ni
Co

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Industrially Useful Microbial Processes
Which of the following substance is employed to neutralize the lactic acid as it is produced (because lactic acid bacteria do not tolerate high concentrations of acid?

CaCO3
(NH4)2 HPO4
MgSO4
Na2SO4

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