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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.
The two DNA strands are complementary and parallel, but they go in opposite directions. The antiparallel structure of DNA is important in DNA replication because it replicates the leading strand one way and the lagging strand the other way. The antiparallel strands allow for the formation of hydrogen bonds between the nitrogenous bases of DNA. If the strands were not antiparallel these nonsymetrical hydrogen bonding interactions would not be possible. It is important that CG interactions have three H- bonds, and AT have two H-bonds.