In gel electrophoresis of DNA, fragments move at different rates because they have different
A)charge densities.
B)sizes.
C)base sequences.
D)amino acid compositions.
E)electrical strengths.

Question

Quizplus · Accepted Answer

The fragments move at different rates due to their sizes. Smaller fragments move faster through the gel, while larger fragments move more slowly. The other choices are not likely to affect the movement of DNA fragments in gel electrophoresis.

In Gel Electrophoresis of DNA, Fragments Move at Different Rates