Q. Two continuous bioreactors containing the same organisms, fed with the same feed at the same dilution rate were compared. Reactor 1 started with an initial concentration of glucose of 10 g.l­¹, while reactor 2 contained 0.1 g.l­¹ of glucose at the start of the process then at steady state

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Q. Yeast is typically produced in fed batch reactors because

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Q. Which of the following organisms will continue their metabolism at high substrate concentrations?

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Q. A fed-batch reactor containing 2 litre of medium and 0.1 g.l­¹ of biomass is fed with a medium containing 1 g.l­¹ of substrate at 1 litre per hour. If after 10 hours, the concentration of biomass in the reactor was 0.2 g.l­¹, then the biomass produced during the 10 hour period is

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Q. A strain of Escherichia coli has a maximum specific growth rate of 0.8 h­¹ on a glucose based medium. If this organism is being grown in a chemostat with a dilution rate of 1.2 h­¹, then at steady state the concentration of E. coli in the same medium will

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Q. In an activated sludge process, the biomass is recycled to

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Q. In a plug flow reactor, the highest concentration of substrates is exposed to the cells that

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Q. Which of the following is not correct with regards to continuous cultures?

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Q. In a glucose-yeast extract medium, Lactococcus lactis has a maximum specific growth rate (um) of 1.23 h­¹. What would be the specific growth rate of this organism at steady state in a 4 litre reactor being fed at 2 litres per hour?

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Q. Pseudomonas aeruginosa has a maximum specific growth rate of 0.8 h­¹ in a medium with glucose as a growth limiting substrate. To prevent wash out, the dilution rate must be set to

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Q. Which of the following would be correct concerning the concentration of biomass (X). growth limiting substrate (S) and product (P) in a chemostat when the cells have been washed out?

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Q. When the product formation is approximately equal to the rate of cell growth, the pattern of product formation is termed as

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Q. A microorganism which is subjected to the Crabtree effect is most likely to

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Q. Which of the following is best described as secondary metabolite?

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Q. When Escherichia coli grow in a well aerated medium, which of the following will occur?

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Q. In the batch-fed mode, substrate will be added

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Q. Continuous culture has an advantage over to a batch cultures as

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Q. Saccharomyces cerevisiae when grown in high glucose concentration medium, the cells activity depends on which of the following?

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Q. In plug flow tubular reactor the axial velocity profile on cross-section will be

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Q. Monoclonal antibodies are typically produced in fed batch reactors because

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