A strain of Escherichia coli has been genetically engineered to produce human protein. A batch culture is started by inoculating 12 g of cells into a 100-litre bubble column fermenter containing 10 g /l glucose. The culture does not exhibit a lag phase. The maximum specific growth rate of the cells is 0.9 h-1; the biomass yield from glucose is 0.575 g /g (a) Estimate the time required to reach stationary phase. (b) What will be the final cell density if the fermentation is stopped after only 70% of the substrate is consumed?
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Roots are the important underground part of all vascular plants. This part of the plant is mainly responsible for anchoring it down into the ground and absorbing the essential mineral elements, nutrients, and water from the soil. It is also used to store food.Explanation:
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