Gel Electrophoresis
Proteins can be visualized directly in gels by

using electron microscope only
none of these
measuring their molecular weight
staining them with the dye

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Gel Electrophoresis
In an SDS-PAGE

proteins are denatured by the SDS
proteins have the same charge-to-mass ratio
All of these
smaller proteins migrate more rapidly through the gel

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Gel Electrophoresis
In SDS-PAGE, the protein sample is first

None of these
treated with a oxidizing agent and then with anionic detergent followed by fractionation by electrophoresis
treated with a reducing agent and then with anionic detergent followed by fractionation by electrophoresis
fractionated by electrophoresis then treated with an oxidizing agent followed by anionic detergent.

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