Ethanol is to be used as a substrate for single-cell protein production in a chemostat. The available equipment can achieve an oxygen transfer rate of 10 g O₂/l of liquid per hour. Assume the kinetics of cell growth on ethanol is of the Monod type, with µm = 0.5 h^–1, K_s = 30 mg/l, YX/S = 0.5 cells/g ethanol, and YO2/S = 2 g O2/g EtOH. We wish to operate the chemostat with an ethanol concentration in the feed of 22 g/L. We also wish to maximize the biomass productivity and minimize the loss of unused ethanol in the effluent. Determine the required dilution rate

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#Question id: 3773

#Section 3: Genetics, Cellular and Molecular Biology

DNA contains the template needed to copy itself, but it has no catalytic activity in cells. What catalyzes the formation of phosphodiester bonds between adjacent nucleotides in the DNA polymer being formed during DNA replication?

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#Question id: 2093

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following is transmembrane proteins?

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#Question id: 166

#Section 2: General Biology

For amino acids with neutral R groups, at any pH below the pI of the amino acid, the population of amino acids in solution will have:

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#Question id: 16018

#Section 6: Plant, Animal and Microbial Biotechnology

pH of culture medium is initially controlled by

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#Question id: 3864

#Section 3: Genetics, Cellular and Molecular Biology

RNA polymerase: