In DNA, the two strands are complementary, meaning that each strand has a corresponding strand with base-pairing rules: adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). This complementary nature allows DNA to maintain its helical structure and enables accurate replication. When DNA is hydrolyzed, it breaks into its individual nucleotides, which are the building blocks of the DNA strands, consisting of a sugar, a phosphate group, and a nitrogenous base.