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Fermentation Reactors - Medical Science

Q1:

The lowest biomass yield in a culture of Escherichia coli will be in

A an aerated batch culture containing a initial high concentration of glucose

B an aerated batch reactor containing an initial low concentration of glucose

C an aerated fed-batch reactor having a low glucose concentration

D an aerated continuous reactor having a low glucose concentration

ANS:A - an aerated batch culture containing a initial high concentration of glucose

High glucose concentration may have glucose effect due to high concentration and so respiration is halted and fermentation starts and then biomass rate decreases. So answer should be C i.e. fed batch to avoid this problem.