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  • Question
  • Which of the following species is used for vitamin B12 production by fermentation process?


  • Options
  • A. Streptomyces griseus
  • B. Streptomyces olivaceus
  • C. Bacillus megaterium
  • D. All of these

  • Correct Answer
  • All of these 


  • Industrially Useful Microbial Processes problems


    Search Results


    • 1. The immediate precursor for glumatic acid production by Corynebacterium glutamicum is

    • Options
    • A. lysine
    • B. oxoacetate
    • C. citrate
    • D. 2-oxo-glutarate
    • Discuss
    • 2. The production of alcohol from lactose of whey is generally carried out by

    • Options
    • A. Saccharomyces cerevisiae
    • B. Candida pseudotropicalis
    • C. Candida utilis
    • D. none of these
    • Discuss
    • 3. The beet molasses is pretreated with __________ to reduce great quantity of trace metals.

    • Options
    • A. ferrocyanide or ferricyanide
    • B. ethylenediamine tetrachloro acetic acid
    • C. hydrochloric acid
    • D. sulphuric acid
    • Discuss
    • 4. Microbial rennet, which is used in cheese manufacture is produced by

    • Options
    • A. Mucor spp
    • B. Aspergillus spp
    • C. Bacillus spp
    • D. Saccharomyces spp
    • Discuss
    • 5. Erythromycin a broad spectrum antibiotic is obtained with the help of

    • Options
    • A. Streptomyces rimosus
    • B. Streptomyces venezuelae
    • C. Streptomyces erythreus
    • D. Streptomyces halstedii
    • Discuss
    • 6. The medium required for glutamic acid mainly consist of

    • Options
    • A. glucose
    • B. molasses
    • C. sucrose
    • D. lactose
    • Discuss
    • 7. Which of the following is not a principal media for industrial alcohol production by fermentation?

    • Options
    • A. Black strap molasses
    • B. Sulphite waste liquor
    • C. Wood waste
    • D. Glucose
    • Discuss
    • 8. Which of the following is true about ?-ionone, non-ionic detergent used in ? carotene fermentation medium?

    • Options
    • A. It is a precursor of ?-carotene fermentation process
    • B. It is regarded as "steering" factor associated with bringing about the presence and activity of the enzymes responsible for ?-carotene formation
    • C. It is an inducer of ? carotene fermentation process
    • D. None of the above
    • Discuss
    • 9. Commercial scale production of amino acids is typically carried out using

    • Options
    • A. regulatory mutants to cause overproduction of biochemical intermediates
    • B. creation of an intentional increase in membrane permeability to increase release of the amino acids
    • C. both (a) and (b)
    • D. none of the above
    • Discuss
    • 10. The method used for obtaining citric acid as fermentation product are commonly known as

    • Options
    • A. submerged aerated fermentation
    • B. stationary tray fermentation
    • C. both (a) and (b)
    • D. none of these
    • Discuss


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