Protein Purification
Gel-filtration chromatography separates on the basis of

None of these
size using porous beads packed in a column
size and shape using porous beads packed in a column
shape using porous beads packed in a column

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Protein Purification
In ion-exchange chromatography

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

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