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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.
Confidence votes 76. In DNA polarity refers to the direction that the molecule is synthesised in. Directionality is important as the genetic code must be read. One end of the molecule is a phosphate-labelled 5' (5 prime) At the other is a hydroxyl group-labelled 3'.It is the polar hydroxyl group that relates to the name 'polarity'.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.