Why can gel electrophoresis separate dna fragments?
o
a. dna fragments are positively charged.
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b. dna fragments are negatively charged.
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c. dna fragments are magnetic.
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d. dna fragments are all the same size.

The correct answer is  b) 

In some developing nations the percentage of the animal protein from fish in the diet can be as high as 25 percent.  about 85% of fish caught is used for human consumption.  the remainder is converted into fishmeal and fish oil.