ENZYMES QUIZ

Synthesis of penicillin is high

pH increase

Mycelial mass increases

Both (a) and (b)

precipitates

aqueous phase

solvent phase

both (a) and (b)

All of these

Slight rise in pH due to liberation of ammonia

Autolysis of the medium starts

Concentration of antibiotic increases in the medium

Ammonia is liberated in the medium

Lactic acid present in the corn steep liquor is utilized at the maximum rate

All of these

Growth of mycelia occurs

aerobic fermentation

anaerobic fermentation

aerobic fermentation followed by anaerobic fermentation

anaerobic fermentation followed by aerobic fermentation

Nocardia sulphurea

Steptomyces ramosus

Steptomyces aureofaciens

All of these

ether

all of these

organic solvents

water

8-9

6-7

5-6

7-8

antibiotic yields are generally higher when cell growth slows

the precursors are often toxic to the cells

All of these

antibiotic yields are generally higher when cells enter the stationary phase

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

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

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

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