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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.
1 Answer. It is not hard to explain why. DNA has a negative charge so it denies from other negative charge and it is attracted by positive charge. DNA is negatively charged due to phosphate groups(that are negatively charged) that together with deoxyribose, binds nitrogen bases in it.