The following figure shows that gel electrophoresis can be used to separate repetitive DNA sequences.Gel electrophoresis separates DNA fragments because ________.
A)double-stranded moves slower than single-stranded DNA
B)of ratios of guanine to cytosine
C)the DNA fragments have different lengths
D)of the salt concentration in the gel matrix

Question

The following figure shows that gel electrophoresis can be used to separate repetitive DNA sequences.Gel electrophoresis separates DNA fragments because ________. 
A)double-stranded moves slower than single-stranded DNA 
B)of ratios of guanine to cytosine 
C)the DNA fragments have different lengths 
D)of the salt concentration in the gel matrix

Quizplus · Accepted Answer

Gel electrophoresis separates DNA fragments based on their size. Since repetitive DNA sequences vary in length, they can be separated by gel electrophoresis. Choice A is not accurate as double-stranded DNA moves faster than single-stranded DNA. Choice B is not relevant for separating DNA fragments. Choice D is not accurate as salt concentration affects the mobility of DNA fragments but does not selectively separate repetitive DNA.

The Following Figure Shows That Gel Electrophoresis Can Be Used