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CuriousTab

CuriousTab

Antibiotics problems


  • 1. At normal pH, penicillin remains in

  • Options
  • A. aqueous phase
  • B. solvent phase
  • C. both (a) and (b)
  • D. precipitates
  • Discuss
  • 2. Fermentation medium for oxytetracyclin (terramycin) consist of

  • Options
  • A. CSL, starch, (NH4)2 SO4, sodium chloride and CaCO3
  • B. CSL, (NH4)2 SO4, sodium chloride and CaCO3
  • C. CSL, starch,(NH4)2 SO4, ammonium chloride and CaCO3
  • D. CSL,(NH4)2 SO4, ammonium chloride and CaCO3
  • Discuss
  • 3. Which of the following precursor is added in the medium to get penicillin G?

  • Options
  • A. Phenyl carbamic acid
  • B. Phenyl acetic acid
  • C. Ammonium sulphate
  • D. Ammonium chloride
  • Discuss
  • 4. Antibiotics are typically produced in fed batch reactors because

  • Options
  • A. antibiotic yields are generally higher when cells enter the stationary phase
  • B. the precursors are often toxic to the cells
  • C. antibiotic yields are generally higher when cell growth slows
  • D. All of the above
  • Discuss
  • 5. Media composition for the production of streptomycin is

  • Options
  • A. soybean meal, glucose, peptone, malt extract, sodium chloride
  • B. soybean meal, glucose, peptone, malt extract, ammonium chloride
  • C. soybean meal, glucose, peptone, malt extract, calcium carbonate
  • D. soybean meal, glucose, peptone, malt extract, ammonium sulphate
  • Discuss
  • 6. The yield of the antibiotic depends upon

  • Options
  • A. pH of the medium
  • B. age of the inoculum
  • C. composition of the medium
  • D. all of these
  • Discuss
  • 7. Chlorotetracyclin is soluble in

  • Options
  • A. organic solvents
  • B. water
  • C. ether
  • D. all of these
  • Discuss
  • 8. 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
  • 9. pH of the fermentation medium for chlorotetracyclins is

  • Options
  • A. 5-6
  • B. 6-7
  • C. 7-8
  • D. 8-9
  • Discuss
  • 10. 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

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