Which statement correctly describes the way DNA moves through a gel electrophoresis?
A. DNA is negatively charged and is therefore attracted to the positively charged end of the gel.
B. DNA is negatively charged and is therefore attracted to the negatively charged end of the gel.
C. DNA is positively charged and is therefore attracted to the positively charged end of the gel.
D. DNA is positively charged and is therefore attracted to the negatively charged end of the gel.