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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Q. The concentration of biomass in a continuous stirred tank reactor is 20 g dry weight per litre. What would be the concentration of biomass in the effluent?

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Q. The ideal tubular-flow fermenter without radial variations is called a

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Q. Pseudo-steady state in a continuous reactor refers to a reactor in which

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Q. The toxicity of organic acids to cells

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Q. The production of an amylase from starch by Aspergillus niger is often performed in a fed batch fermenter. This is due to the reason that

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