How do the strategically placed covalent and hydrogen bonds present in dna facilitate the functioning of the molecule

Answer and explanation;DNA is a double stranded molecule. Covalent and hydrogen bonds pray important roles in the functioning of DNA molecules. Covalent bonds occur within each linear strand and strongly bond the nucleotide bases, sugars, and phosphate groups occurring both within each component and between components. Hydrogen bonds occur between the two strands and involve a base from one strand with a base from the second in complementary pairing.Hydrogen bonds helps the complementary base pairs in DNA; guanine with cytosine and adenine with thymine to connect to one another. The hydrogen bonds between these complementary pairs helps keep the two strands of DNA helix together.

I think gamete incompatibility.