ANTIBIOTICS QUIZ

8-9

6-7

5-6

7-8

antibiotic yields are generally higher when cell growth slows

All of these

the precursors are often toxic to the cells

antibiotic yields are generally higher when cells enter the stationary phase

both (a) and (c)

source of nutrients

carbon source

antifoam agent

solvent phase

aqueous phase

precipitates

both (a) and (b)

Phenyl acetic acid

Phenyl carbamic acid

Ammonium chloride

Ammonium sulphate

during the second phase

same in all the phases

during the third phase

during the first phase

CSL, (NH4)2 SO4, sodium chloride and CaCO3

CSL, starch, (NH4)2 SO4, sodium chloride and CaCO3

CSL,(NH4)2 SO4, ammonium chloride and CaCO3

CSL, starch,(NH4)2 SO4, ammonium chloride and CaCO3

Steptomyces aureofaciens

Steptomyces ramosus

Nocardia sulphurea

All of these

soybean meal, glucose, peptone, malt extract, ammonium chloride

soybean meal, glucose, peptone, malt extract, calcium carbonate

soybean meal, glucose, peptone, malt extract, sodium chloride

soybean meal, glucose, peptone, malt extract, ammonium sulphate

all of these

ether

organic solvents

water