The concept defines the biochemical mechanism of complementary base pairing within nucleic acid structures, governed strictly by Chargaff's rules and hydrogen bonding specificity between adenine-thymine and cytosine-guanine pairs. It establishes a deterministic correspondence where purines exclusively pair with pyrimidines to maintain consistent helical geometry, forming the foundational stoichiometric constraint for double-stranded nucleic acid topology. This theoretical framework operates within molecular genetics and biochemistry as a fundamental axiom describing the structural stability and information storage capacity of nucleic acid polymers.
Prerequisite chain context: requires Purine and Pyrimidine Ring Structures.