Biology / Bio 1523 · Atom · ~20 seconds
Gel Electrophoresis
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Gel electrophoresis separates DNA or RNA fragments by size, using an electric field to pull the negatively charged fragments through a porous gel.
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Smaller fragments move farther through the gel than larger fragments in the same amount of time, forming a ladder of separated bands.
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Electrophoresis separates fragments by size alone — it does not itself reveal a fragment's sequence.