What type of bond is primarily responsible for the structure of DNA?

The structure of DNA is primarily maintained by covalent bonds, specifically the phosphodiester bonds that link the sugar and phosphate groups of the DNA backbone. These strong covalent bonds create a stable framework for the DNA strand, allowing it to withstand the various processes it undergoes during replication and transcription.

While hydrogen bonds also play a critical role in stabilizing the double helix structure of DNA by connecting complementary base pairs (adenine with thymine, and guanine with cytosine), the question specifically asks about the type of bond primarily responsible for the overall structure, which is the covalent bond. Ionic bonds and disulfide bonds are not relevant to the main structural framework of DNA; ionic bonds involve the attraction between charged particles, and disulfide bonds are typically found in protein structures, not in nucleic acids like DNA.