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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.
Polarity is determined by the dipole-dipole moment about a molecule. If a molecule has ligands (atoms bonded to it) that are different in their electronegativity, such as CH3C â¦ l, it will be very polar. molecule like CH4, (methane), will be nonpolar. All the ligands attached to carbon have the same electronegativity, so there is no difference in dipole around carbon.