Glucose is converted to ethanol by immobilized yeast cells entrapped in gel beads. The specific rate of ethanol production is: q_P = 0.2 g ethanol/g-cell-h. The effectiveness factor for an average bead is 0.8. Each bead contains 50 g/L of cells. The voids volume in the column is 40%. Assume growth is negligible (all glucose is converted into ethanol). The feed flow rate is F = 400 l/h and glucose concentration in the feed is S_0i = 150 g glucose/l. The diameter of the column is 1 m and the yield coefficient is about 0.49 g ethanol/g glucose. The column height is 4 m. What is the ethanol concentration in the exit stream?

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#Question id: 15142

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Dot matrix analysis of the amino acid sequences of lambda phage cI (horizontal sequence) and phage P22 c2 (vertical sequence) repressors is shown below. Which one of the following is correct?

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#Question id: 3874

#Section 3: Genetics, Cellular and Molecular Biology

A branched (“lariat”) structure is formed during:

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#Question id: 590

#Section 2: General Biology

Which enzyme below is fastest?

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#Question id: 14435

#Section 5: Bioprocess Engineering and Process Biotechnology

Differential centrifugation separates the particle which is different in 

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#Question id: 3572

#Section 3: Genetics, Cellular and Molecular Biology

How might the ability of pea plants to self fertilize be a problem for genetic experiments?