Help with DNA Structure...PLEASE!!!

Welcome to the forum!

You haven't posted any diagram, but to make it easier to explain, here's a diagram of what a typical DNA should look like: http://www.d.umn.edu/cla/faculty/troufs/anth1602/images/dna_0303_500.jpg

The backbone of deoxyribonucleic acid, or DNA for short, is composed of alternating phosphate and sugar residues. The sugar in DNA is 2-deoxyribose, which is a pentose (five-carbon) sugar. These are joined together by phosphate groups that form photodiester bonds, between the third and fifth carbon atoms of adjacent sugar rings. The DNA strands are antiparellel which means, the direction of nucleotides in one strand is opposite to their direction in the other, and they are called 5' (five prime), and 3' (three prime) ends, with the 5' end having a terminal phosphate group, and 3' end a terminal hydroxyl group. It is stabilized primarily by H-bonds, and base-stacking interactions among aromatic nucleobases.