Biotechnology

AP Biology· difficulty 2/5

Gel electrophoresis separates DNA fragments based on

A
$Sequence — fragments with similar sequences migrate together through the gel$
B
$Size — smaller fragments migrate further through the gel pores$
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C
$Charge — positively charged fragments migrate further through the gel pores$
D
$Density — denser fragments migrate further through the gel pores$

Explanation

DNA is negatively charged; an electric field drives it through the gel mesh, with smaller fragments moving faster.

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