A fish swimming into an estuary from a river would have which of the following as its greatest physiological challenge?

#Question id: 1082

#SCPH01 Biochemistry

Which of the following is a type of signaling in which a cells respond to substrate that they themselves release ?

#Question id: 5115

#SCPH01 Biochemistry

At the time of mid-blastula transition which of the following event not occur?

#Question id: 14295

#SCPH05 I Biotechnology

Pseudomonas methylotrophus is used to produce single-cell protein from methanol in a 1000 m³ pressure-cycle airlift fermenter. The biomass yield from substrate is 0.41 g g^{- 1}, K_S is 0.7 mg l^{- 1}, and the maximum specific growth rate is 0.44 h^{- 1}. The medium contains 4% (w/v) methanol. A substrate conversion of 98% is desirable. The reactor may be operated either in batch or continuous mode. If operated in batch, an inoculum of 0.01% (w/v) is used and the downtime between batches is 20 h. If operated continuously, a downtime of 25 d is expected per year. Neglecting maintenance requirements, compare the annual biomass production from batch and continuous reactors?

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#Question id: 563

#I Life Science/ Life Sciences Group – I-V

Both water and glucose share an —OH that can serve as a substrate for a reaction with the terminal phosphate of ATP catalyzed by hexokinase.  Glucose, however, is about a million times more reactive as a substrate than water.  The best explanation is that:

#Question id: 1407

#SCPH28 | Zoology

Which of the following is pro-apoptotic?

a. Bax              b. Bcl-2                       c. p53              d. protein kinase B      e. PTEN