A reaction is first order in A. If the rate constant of the reaction is 3.45 × 10^–3 s^–1, what is the half-life (t1/2) of the reaction?

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#Question id: 2071

#Section 2: General Biology

Diffusion of ions across membranes through specific ion channels is driven by:

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#Question id: 14253

#Section 5: Bioprocess Engineering and Process Biotechnology

Hybridoma cells immobilized on surfaces of Sephadex beads are used in a packed column for production of monoclonoal antibodies (Mab). Hybridoma concentration is approximately X = 5 g/l in the bed. The flow rate of the synthetic medium and glucose concentration are Q = 2 l/h and S0 = 40 g/l, respectively. The rate constant for Mab formation is k = 1 gX/l-d. Assume that there are no diffusion limitations and glucose is the rate limiting nutrient.  Determine the volume of the packed bed for 95% glucose conversion. Bed diameter is D0 = 0.2 m. Neglect the growth of the hybridomas and assume first order kinetics. 

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#Question id: 14574

#Section 2: General Biology

High concentrations of salt and sugar in foods

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#Question id: 14702

#Section 1: Engineering Mathematics

The area bounded by curve x² = 4y and straight line x = 4y - 2 is

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#Question id: 3754

#Section 3: Genetics, Cellular and Molecular Biology

Thymine makes up 28% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be guanine?