Where do hydrogen bonds occur in the DNA structure and how d

Where do hydrogen bonds occur in the DNA structure and how does hydrogen bonding contribute to the secondary structure of DNA?

Solution

Ans). The two strands of DNA stay together by hydrogen bonds that is complementary nucleotide base pairs. Two hydrogen bonds occur between the adenosine and the thymine base pairs, and three hydrogen bonds occur  between the cytosine and the guanine.

Secondary structure is the set of interactions between bases. In DNA the two strands of DNA are held together by hydrogen bonds.