Exercise: Protein Purification

Questions for: Protein Purification

The best way to determine the location of protein in the purification scheme is to measure the
A:
rate of ATP synthesis
B:
changes in the refractive index
C:
UV absorption
D:
mass spectroscopy of the protein
Answer: A
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Proteins separation can be carried out on the basis of
A:
net charge
B:
solubility in salt solutions
C:
size or mass
D:
all of these
Answer: D
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A purified protein sample contains 10 μg of protein and has an enzyme activity of 1 m mole of ATP synthesized/sec (1 unit). What is the specific activity of the final purified sample?
A:
1,000 units/mg
B:
10,000 units/mg.
C:
100,000 units/mg
D:
1,000,000 units/mg
Answer: C
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Affinity chromatography deals with the
A:
specific binding of a protein constituents for another molecule
B:
protein - protein interaction
C:
protein - carbohydrate interaction
D:
none of the above
Answer: A
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Gel-filtration chromatography separates on the basis of
A:
size and shape using porous beads packed in a column
B:
size using porous beads packed in a column
C:
shape using porous beads packed in a column
D:
none of the above
Answer: A
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