Which of the following choices most likely lists the sizes of the four DNA fragments in lane 6 (from top to bottom) of this agarose gel stained with ethidium bromide? (Note: The well that the DNA was loaded into is at the top of the gel image.)
A) 600 bp, 450 bp, 300 bp, 100 bp
B) 100 bp, 300 bp, 450 bp, 600 bp
C) 400 bp, 300 bp, 600 bp, 100 bp
D) 300 bp, 400 bp, 100 bp, 600 bp
E) DNA fragment size can't be estimated using an agarose gel.
Answer: A
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