During Gel Electrophoresis, DNA Fragments

Question

During gel electrophoresis, DNA fragments
A)travel through a matrix containing a microscopic network of pores.
B)migrate toward a negatively charged electrode.
C)can be visualized without stains or labels.
D)are separated on the basis of their sequence.

Accepted Answer

DNA fragments travel through a gel matrix, which contains a microscopic network of pores, during gel electrophoresis. This allows for the separation of DNA fragments based on size, not sequence, and they migrate toward the positively charged electrode due to the negative charge of the DNA. Visualization typically requires stains or labels.