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OpenStudy (anonymous):

what is a role of chilled ethanol in dna extraction?

OpenStudy (shrutipande9):

chilled absolute ethanol is used to wash out alcohol soluble impurities...and 70% ethanol is used to precipitate DNA

OpenStudy (rina.r):

If you really had extracted DNA "thousands of times", you'd know that DNA does NOT dissolve in ethanol. That, in fact, is why it's used. It precipitates the DNA - causes it to come out of solution.

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