Which one of the following controllers improves steady state error and also stability of the system?

#Question id: 3885

#Section 3: Genetics, Cellular and Molecular Biology

AZT (3'-azido-2',3'-dideoxythymidine), used to treat HIV infection, acts in HIV-infected cells by:

#Question id: 4346

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following results would occur if the repressor of an inducible operon were mutated so that it could not bind the operator?

#Question id: 27151

#Section 4: Fundamentals of Biological Engineering

The unit of volumetric oxygen transfer coefficient (KLa) is

#Question id: 14267

#Section 5: Bioprocess Engineering and Process Biotechnology

In a trickling biological filter, the BOD value of the feed stream is S_0i = 500 mg/l with a feed flow of F = 10³ l/h. The effluent BOD value is desired to be S₀ = 10 mg/l. The following kinetic parameters for the biocatalysts are known: r_m = 20 mg/S/l .h and K_s = 200 mg S/l. The biofilm thickness is L = 0.1 mm. The cross-sectional area of the filter is A = 2 m² , and the biofilm surface area per unit volume of the bed is a = 500 cm² /cm³ . Assume that dissolved oxygen is the rate-limiting substrate and the diffusion coefficient of oxygen is D_O2 = 2 × 10^-5 cm² /s. Determine the required height of the bed. You can assume first-order bioreaction kinetics?

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#Question id: 27254

#Section 3: Genetics, Cellular and Molecular Biology

The nucleosome consists of histone