Electrophoresis separates dna fragments of different sizes, but this technique does not indicate which of the fragments contains the dna piece of interest. this problem is solved by select one:
a. identifying the molecular weights of the fragments in question.
b. measuring the sizes of the bands on the gel.
c. removing the bands from the gel and hybridizing with a known strand of dna complementary to the gene of interest.
d. knowing the isoelectric points of the piece in question.
e. none of the other answers