ANTIBIOTICS QUIZ

solvent phase

both (a) and (b)

aqueous phase

precipitates

calcium penicillin

penicillin only

potassium penicillin

sodium penicillin

no aeration

aeration which does not affect the yield

continuous aeration

controlled aeration

wheat seeds

rice seeds

barley seeds

all of these

anaerobic fermentation

aerobic fermentation

aerobic fermentation followed by anaerobic fermentation

anaerobic fermentation followed by aerobic fermentation

precipitates

aqueous phase

both (a) and (b)

solvent phase

the precursors are often toxic to the cells

antibiotic yields are generally higher when cell growth slows

antibiotic yields are generally higher when cells enter the stationary phase

All of these

Phenyl carbamic acid

Phenyl acetic acid

Ammonium chloride

Ammonium sulphate

7-8

5-6

6-7

8-9

All of these

Steptomyces ramosus

Nocardia sulphurea

Steptomyces aureofaciens