Gel Electrophoresis
Proteins can be visualized directly in gels by

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

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

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

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Gel Electrophoresis
Electrophoresis of histones and myoglobin under non-denaturing conditions (pH = 7.0) results in

both proteins migrate to the cathode
histones migrate to the cathode and myoglobin migrates to the anode
histones migrate to the anode and myoglobin migrates to the cathode
both proteins migrate to the anode

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