Gel electrophoresis separates DNA fragments on the basis of differences in their ________.
A)A:C ratio
B)length
C)G:T ratio
D)pH

Question

Quizplus · Accepted Answer

Gel electrophoresis separates DNA fragments based on their length. The DNA fragments are placed in wells at one end of a gel and an electrical current is applied, causing the DNA to migrate through the gel. Because smaller fragments move more quickly through the gel, the fragments become separated based on their size. The separated fragments can then be visualized using a stain and compared to a molecular weight marker to determine their size.

Gel Electrophoresis Separates DNA Fragments on the Basis of Differences