Which of the Following Is NOT True Regarding DNA Gel

Which of the following is NOT true regarding DNA gel electrophoresis?

A) The agarose gel acts as a molecular sieve separating DNA fragments based on size.
B) Larger DNA fragments will migrate farther than smaller DNA fragments will.
C) By passing an electrical current through the gel,DNA fragments move toward the positive end.
D) Fragments of known size are used to measure the size of the sample DNA.
E) DNA needs to be stained in order to be visualized.