Gel Electrophoresis
Proteins can be visualized directly in gels by

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

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Gel Electrophoresis
In an SDS-PAGE

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

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

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

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