A waste-water stream of F = 1 m3 /h with substrate at 2000 mg/l is treated in an upflow packed bed containing immobilized bacteria in form of biofilm on small ceramic particles. The effluent substrate level is desired to be 30 mg/l. The rate of substrate removal is given by the following equation

                   

By using the following information, determine the required height of the column (H). k = 0.5 h-1, X = 10 g/l, Ks = 200 mg/l, L = 0.2 mm, α = 100 m2 /m3 , A = 4 m2 , η = 0.8

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#Question id: 133

#Section 2: General Biology

Tyrosine and tryptophan are less hydrophobic than phenylalanine because

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#Question id: 12920

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

The development of isothermal systems such as the ____ DNA amplification system do away with the need for a thermal cycler and have the advantage of being able to be used outside the laboratory.

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#Question id: 3658

#Section 3: Genetics, Cellular and Molecular Biology

In E. coli, the UvrABC endonuclease removes _____________and other bulky lesions by recognizing the distortion these produce in the double helix.

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#Question id: 146

#Section 2: General Biology

The pH inside cells is normally near pH 7. At pH 7 which statement is true about the charges (ionization state) of the α-Carboxyl and α-Amino groups of an amino acid?

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#Question id: 1608

#Section 2: General Biology

Pattern recognition receptors (PRR) include which of the following?