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Alekssandra [29.7K]
3 years ago
7

DNA molecules of different sizes are often separated with the use of a technique called electrophoresis (see Chapter 19). With t

his technique, DNA molecules are placed in a gel, an electrical current is applied to the gel, and the DNA molecules migrate toward the positive (+) pole of the current. What aspect of its structure causes a DNA molecule to migrate toward the positive pole?
Biology
1 answer:
tresset_1 [31]3 years ago
6 0

Answer:

Explanation:

A DNA molecule is a polymer of nucleotides, which are made up of a nitrogenous base, a sugar and a phosphate group.

The phosphate groups are negatively charged, giving the sugar-phosphate backbone a negative charge. This negative charge causes the DNA molecule to be attracted to the positive pole of the current and thus migrate towards it.

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