What is the function of gel electrophoresis in genetic engineering?

Cut DNA into many fragments

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Link together newly joined fragments of DNA

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Make millions of copies of a specific segment of DNA

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Separate fragments of DNA by their length and electrical charges

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Solution

The correct option is D Separate fragments of DNA by their length and electrical charges
Gel electrophoresis is a technique used to separate DNA fragments according to their size. DNA samples are loaded into wells (indentations) at one end of a gel, and an electric current is applied to pull them through the gel. DNA fragments are negatively charged, so they move towards the positive electrode.
So, the correct option is 'Separate fragments of DNA by their length and electrical charges'.

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