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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.
DNA is negatively charged due to the negatively charged phosphate ions in its structure. DNA carries 2 negative charges per base pair (whose length is 0.34 nm). As a title oâ¦f example, the human DNA has about 6 thousands of million (6 x 10^9) base pairs. This gives a total charge of 12 thousands of million negative charges (12 x 10^9 negative charges), and a total length of about 2 meters.