Microbial cell recovery is carried out in a continuous disc-stack centrifuge. The centrifuge is operated at 5000 rpm for separation of baker's yeast. At a feed rate of 60 1/min, 50% of the cells are recovered. At constant speed, solid recovery is inversely proportional to flow rate. What operating speed is required to recover 90% of cells if the flow rate in the centrifuge is maintained at 601/min? 

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#Question id: 5213

#SCPH28 | Zoology

Which of the following is a major distinction between a transposon and a retrotransposon?

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#Question id: 1590

#SCPH05 I Biotechnology

An epitope associates with which part of an antibody?

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#Question id: 4562

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

Which stratum should contain the greatest proportion of extinct organisms?

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#Question id: 59

#SCPH05 I Biotechnology

Nitrogen (N) normally forms three covalent bonds with a valence of five. However, ammonium has four covalent bonds, each to a different hydrogen (H) atom (H has a valence of one). What do you predict to be the charge on ammonium?

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#Question id: 12937

#SCPH01 Biochemistry

Choose the incorrect statement about Yeast Artificial Chromosome vectors.