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Split and merge into it. Answer by YungSan3. Confidence votes 6. yes DNA is soluble in water. the phosphate backbone is negative so it is polar. This polarity allows water, which is also a polar molecule, to dissolve the DNA.plit and merge into it. Answer by YungSan3. Confidence votes 6. yes DNA is soluble in water. the phosphate backbone is negative so it is polar. This polarity allows water, which is also a polar molecule, to dissolve the DNA.
Best Answer: Hey =]! For routine precipitation of nucleic acids, you need enough salt to neutralize the repulsion among the negatively charged strands of DNA, and enough alcohol to pull water molecules out of the DNA strand.In other words ethanol is used to dehydrate the DNA molecule, by creating a greater gradient.he DNA is dissolved in the mixture you have made with water, the sample, and probably detergent and meat tenderizer (maybe salt or baking soda, too). When you pour in the ice cold alcohol, the DNA comes out of solution and appears in the alcohol. ecolink Â· 8 years ago.