Protein Purification
During successful purification scheme, this may be expected that the

specific activity decreases
both (a) and (c)
number of proteins in the sample decreases
specific activity increases

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Protein Purification
In ion-exchange chromatography

proteins are separated on the basis of their shape
either (b) or (c)
proteins are separated on the basis of their size
proteins are separated on the basis of their net charge

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