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  • Question
  • Penicillin is recovered after fermentation as


  • Options
  • A. potassium penicillin
  • B. calcium penicillin
  • C. sodium penicillin
  • D. penicillin only

  • Correct Answer
  • potassium penicillin 


  • Antibiotics problems


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    • 1. Penicillin is produced by

    • Options
    • A. aerobic fermentation
    • B. anaerobic fermentation
    • C. aerobic fermentation followed by anaerobic fermentation
    • D. anaerobic fermentation followed by aerobic fermentation
    • Discuss
    • 2. Media used for the production of chlorotetracyclin consists of

    • Options
    • A. sugar, corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl
    • B. corn steep liquor, CaCO3 and (NH4)2SO4
    • C. sugar, CaCO3 and (NH4)2SO4
    • D. corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl
    • Discuss
    • 3. pH of the fermentation medium for chlorotetracyclins is

    • Options
    • A. 5-6
    • B. 6-7
    • C. 7-8
    • D. 8-9
    • Discuss
    • 4. During which phase of growth of Penicillium chrysogenum maximum antibiotic production takes place

    • Options
    • A. during the first phase
    • B. during the second phase
    • C. during the third phase
    • D. same in all the phases
    • Discuss
    • 5. Chlorotetracyclin is soluble in

    • Options
    • A. organic solvents
    • B. water
    • C. ether
    • D. all of these
    • Discuss
    • 6. Streptomycin is produced by

    • Options
    • A. S. griseus
    • B. S. griseoflavus
    • C. S. aerofaciens
    • D. S. ramosus
    • Discuss
    • 7. Which of the following organism(s) produce(s) tetracycline?

    • Options
    • A. Steptomyces aureofaciens
    • B. Steptomyces ramosus
    • C. Nocardia sulphurea
    • D. All of these
    • Discuss
    • 8. Which of the following changes occur during first phase of growth of Penicillium chrysogenum?

    • Options
    • A. Growth of mycelia occurs
    • B. Ammonia is liberated in the medium
    • C. Lactic acid present in the corn steep liquor is utilized at the maximum rate
    • D. All of the above
    • Discuss
    • 9. At acidic pH, penicillin remains in

    • Options
    • A. aqueous phase
    • B. solvent phase
    • C. both (a) and (b)
    • D. precipitates
    • Discuss
    • 10. Inoculum preparation for the fermentation medium for penicillin takes place on

    • Options
    • A. wheat seeds
    • B. barley seeds
    • C. rice seeds
    • D. all of these
    • Discuss


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