Figure 1. DNA Double Helix. Redirected to: http://whatdnatest.com/genetics/structure-and-function-of-the-dna-molecule/ You probably know that the DNA is the physical support of our genetic information and that it is a double helix molecule. Lets see its structure and function with a little bit more of detail.   In figure 1 you can see a fragment of DNA. The backbone is in the outside in