Streptomycin is produced by S. aerofaciens S. griseoflavus S. ramosus S. griseus TRUE ANSWER : ? YOUR ANSWER : ?
Antibiotics are typically produced in fed batch reactors because antibiotic yields are generally higher when cells enter the stationary phase the precursors are often toxic to the cells antibiotic yields are generally higher when cell growth slows All of these TRUE ANSWER : ? YOUR ANSWER : ?
Penicillin is recovered after fermentation as calcium penicillin potassium penicillin sodium penicillin penicillin only TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following precursor is added in the medium to get penicillin G? Phenyl acetic acid Ammonium sulphate Phenyl carbamic acid Ammonium chloride TRUE ANSWER : ? YOUR ANSWER : ?
Chlorotetracyclin is soluble in organic solvents ether all of these water TRUE ANSWER : ? YOUR ANSWER : ?
At acidic pH, penicillin remains in both (a) and (b) aqueous phase solvent phase precipitates TRUE ANSWER : ? YOUR ANSWER : ?
pH of the fermentation medium for chlorotetracyclins is 8-9 5-6 6-7 7-8 TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following organism(s) produce(s) tetracycline? Steptomyces ramosus Steptomyces aureofaciens All of these Nocardia sulphurea TRUE ANSWER : ? YOUR ANSWER : ?
Penicillin is produced by aerobic fermentation followed by anaerobic fermentation aerobic fermentation anaerobic fermentation anaerobic fermentation followed by aerobic fermentation TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following event occurs during second phase of growth of P. chrysogenum? Mycelial mass increases pH increase Both (a) and (b) Synthesis of penicillin is high TRUE ANSWER : ? YOUR ANSWER : ?