Nicotiana tabacum cells are cultured to high density for production of polysaccharide gum. The reactor used is a stirred tank, containing initially 100 litres medium. The maximum specific growth rate of the culture is 0.18 d^-1 and the yield of biomass from substrate is 0.5 g g^-l. The concentration of growth-limiting substrate in the medium is 3% (w/v). The reactor is inoculated with 1.5 g l^{- 1} cells and operated in batch until the substrate is virtually exhausted; medium flow is then started at a rate of 4 l d^-1. Fed-batch operation occurs under quasi-steady-state conditions. Fed-batch operation is carried out for 40 d. What is the final mass of cells in the reactor?

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#Question id: 4325

#SCPH28 | Zoology

Cell differentiation always involves

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#Question id: 4326

#SCPH01 Biochemistry

Which of the following is an example of post-transcriptional control of gene expression?

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#Question id: 4326

#SCPH05 I Biotechnology

Which of the following is an example of post-transcriptional control of gene expression?

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#Question id: 4326

#SCPH06 I Botany

Which of the following is an example of post-transcriptional control of gene expression?

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#Question id: 4326

#SCPH28 | Zoology

Which of the following is an example of post-transcriptional control of gene expression?

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#Question id: 4327

#SCPH01 Biochemistry

What would occur if the repressor of an inducible operon were mutated so it could not bind the operator?