If a long-day plant has a critical night length of 9 hours, which 24-hour cycle would prevent flowering? (SS)

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#Question id: 3859

#SCPH01 Biochemistry

Polyadenylation is:

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#Question id: 838

#SCPH05 I Biotechnology

Which of the following correct predict the transition state?

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#Question id: 15757

#SCPH05 I Biotechnology

Which of the following growth hormones produces apical dominance?

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#Question id: 14253

#SCPH05 I 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: 15478

#SCPH01 Biochemistry

Escherichia coli preferentially utilizes glucose by preventing the uptake of lactose and switching off transcription of the lac operon. This mechanism is known as