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DNA is a polar molecule because it has a negatively (-) charged phosphate group attached to the 5' end of the molecule and a negatively charge hydroxl group (OH) attached to t â¦ he 3' prime end of the molecule. Thus, it is a POLAR molecule which allows it to interact in an aqueous environment.NA is a polar molecule because it has a negatively (-) charged phosphate group attached to the 5' end of the molecule and a negatively charge hydroxl group (OH) attached to t â¦ he 3' prime end of the molecule.
ethanol is very polar. don't believe that DNA is soluble in water. water molecules interact with the DNA. if you add enough ethanol, you will remove those water molecules from the DNA and the DNA will precipitate.furthermore, in the presence of salts... ethanol helps to pair the ions which aids in their precipitation.NA consists of proteins that are polar. Water is polar so it is soluble in water. Alcohol is also non-polar, so insoluble in ethanol...u owe me 10 pts for this one.