In a fermenter the impeller diameter is increased from 0.5m to 1m and the rpm is increased from 100 rpm to 400 rpm. Reynolds number will increase by?

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#Question id: 18072

#SCPH06 I Botany

First invertebrates insects fossil appeared in which of the following geological ages?

a) Mesozoic b) Jurassic

c) Paleozoic d) Devonian

e) Permian f) Pennsylvanian

Which of the following combinations give the best answer?

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#Question id: 11477

#SCPH28 | Zoology

How could you genetically modify an animal so that it would distinguish more shades of green?

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#Question id: 13059

#SCPH06 I Botany

Precision will be reduced, but yield will be increased

Optimisation of a PCR reaction is often a compromise between the competing demands for precision, efficiency and yield. Although the specific effects may vary, generally, increasing the annealing temperature will increase non-specific primer binding and reduce precision. Increasing the length of the elongation phase will reduce the proportion of incomplete newly-synthesised strands and therefore increase yield. In this case, the potential effect on efficiency is unclear. Increasing the elongation phase would increase the reaction time, but the time taken to ramp down to a lower annealing temperature would be reduced.

Efficiency during ligation of blunt ended insert and vector cannot be cannot be enhanced by means of…..

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#Question id: 818

#SCPH28 | Zoology

Which one of the following weak interactions have central features of protein structures, but makes only minor contributions to protein stability?

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#Question id: 11008

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

Which of the following events is associated with the first heart sound?