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  • Question
  • Which of the following organism is utilized to obtain commercial L-lysine by direct method?


  • Options
  • A. Micrococcus glutamicus
  • B. Mutated strain of Micrococcus glutamicus
  • C. Brevibacterium aminogenes
  • D. Mutated strain of Brevibacterium aminogenes

  • Correct Answer
  • Mutated strain of Micrococcus glutamicus 


  • Industrially Useful Microbial Processes problems


    Search Results


    • 1. The first commercial fermention carried out to obtain L-lysine is known as

    • Options
    • A. dual fermentation
    • B. indirect fermentation
    • C. direct fermentation
    • D. both (a) and (b)
    • Discuss
    • 2. The other name of invertase enzyme is

    • Options
    • A. sucrase
    • B. saccharase
    • C. isomerase
    • D. both (a) and (b)
    • Discuss
    • 3. Which of the following is not a penicillin?

    • Options
    • A. Penicillin G
    • B. Penicillin X
    • C. Penicillin V
    • D. Penicillin Y
    • Discuss
    • 4. Bacillus thuringiensis is useful as a bacterial

    • Options
    • A. source of antibiotics
    • B. producer of vitamins
    • C. herbicide
    • D. pesticide
    • Discuss
    • 5. The precursor of Penicillin G is

    • Options
    • A. phenoxy acetic acid
    • B. phenyl acetic acid
    • C. hydroxy phenyl acetic acid
    • D. none of these
    • Discuss
    • 6. Penicillin was first produced commercially using

    • Options
    • A. stationary mat culture
    • B. deep tank aerated fermentations
    • C. continuous fermentation
    • D. none of the above
    • Discuss
    • 7. Malt used to ferment beer is prepared by

    • Options
    • A. roasting barley
    • B. washing the barley with water and drying it in air
    • C. soaking barley in water followed by germination and drying
    • D. treating barley with bovine amylase followed by roasting
    • Discuss
    • 8. Most biopolymers produced by micro-organisms are

    • Options
    • A. cell wall constituents
    • B. nucleic acids
    • C. histones
    • D. exopolysaccharides
    • Discuss
    • 9. The medium utilized for fungal citric acid production should be deficient in

    • Options
    • A. phosphate
    • B. manganese
    • C. iron
    • D. all of these
    • Discuss
    • 10. The method of distillation used to obtain alcohol greater than 95 percent is called

    • Options
    • A. fractional distillation
    • B. flash evaporation
    • C. azeotropic distillation
    • D. successive distillation
    • Discuss


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