Q. In batch culture, protogon is produced from peptone during the stationary phase with a yield of 0.4 protogon mg per g of peptone. If it is to be produced in a chemostat at a dilution rate of 0.5 h­¹ from a medium containing 10 g.l­¹ of peptone, then the rate of protogon synthesis would be

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Q. Formation of end product by Lactococcus lactis will become non-growth associated as lactic acid accumulates because

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Q. Which of the following would not be subjected to the "glucose effect"?

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Q. Immobilized cell reactors for wastewater treatment have the advantage of having/being

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Q. Yield coefficient represents

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

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Q. When two populations compete for a single growth limiting substrate in a continuous fermenter, which organism would not be washed out?

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Q. The continuous cultures are not widely used in industry because

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Q. The lowest yield of ATP /is in

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Q. A chemostat has a liquid volume of 2 litres and is being fed at a rate of 4 litres per hour. Dilution rate for this reactor will be

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Q. Mixing per unit volume is observed to be poorest in

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Q. The growth of an organism on glucose is described by the following Monod model parameters: μm = 0.5 h­¹ and Ks =0.1 g.l­¹, if the concentration of glucose in the feed is 10 g.l­¹ and the dilution rate is set to 0.4 h­¹, then the steady state concentration of glucose in the effluent will be

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Q. A continuous reactor at steady state contains 0.04 g.l­¹ of biomass and 0.02 g.l­¹ of phenol. The feed contained 0.1 g.l­¹ of phenol. The biomass yield would be

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Q. A culture system with constant environmental conditions maintained through continual provision of nutrient and removal of wastes is called __________ culture system.

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Q. Unsteady state mass balance for dynamic model of continuous stirred tank reactor (CSTR) is

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Q. A fed-batch reactor initially contains 2 litre of medium. If it was fed at 1 litre per hour, then after 10 hours, the volume of the reactor will be

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Q. A Bacillus sp. produces an antibiotic only during the stationary phase when grown in a batch culture. If grown in a 5 litre continuous culture, the steady state productivity of the antibiotic

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Q. In a fluidized bed reactor, the function of the disengagement zone is to

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Q. Saccharomyces cerevisiae produces high biomass yields at low glucose concentrations and high dissolved oxygen concentrations. Which of the following should be followed for maximizing its biomass productivity?

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Q. Production of organic acids in batch culture is generally growth associated phase followed by non-growth associated production. The probable reason for this is that

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