When an electric field is applied to an agarose gel in DNA gel electrophoresis, why do the DNA fragments migrate through the gel toward the anode?

Question

Answer

Due to the ethidium bromide intercalating with DNA base pairs.

Answer

Because they have flagella and swim through the gel.

Answer

Because the buffer has a net negative charge.

Answer

All of the listed answers are correct.

Answer

Due to the negatively charged phosphates in DNA nucleotides.

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