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

Question

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] · Answer 1 · 2022-08-14T16:30:34+03:00

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.