Question

question 4
2 points
in a gel electrophoresis chamber, there is a positive electrode at one end and a negative electrode at the other. dna and rna molecules are negatively charged.
based on this information, in which direction will dna and rna molecules move in the gel, and why?
a toward the negative electrode, because opposite charges attract
b they will stay in place because they are negatively charged
c toward the positive electrode, because similar charges repel
d toward the positive electrode, because opposite charges attract

Explanation:

DNA and RNA are negatively charged. In an electric field, opposite charges attract. Since there is a positive electrode in the gel electrophoresis chamber, the negatively - charged DNA and RNA will be attracted to the positive electrode.

Answer:

D. Toward the positive electrode, because opposite charges attract