DNA is a long polymer made from repeating units called nucleotides, each of which is usually symbolized by a single letter either A, T, C, or G Chargaff's rules state that DNA from any species of any organism should have a 11 protein stoichiometry ratio (base pair rule) of purine and pyrimidine bases (ie, AT=GC) and, more specifically, that the amount of guanine should be equal toA green solvent Quantitative thermodynamic analyses shows that A–T base pairs are more stable than G–C base pairs in the hydrated ionic‐liquid choline dihydrogenphosphate because of specific interactions between DNA bases and choline ionsIn normal DNA, A will pair with T across the double helix and C will pair with G More importantly, the nucleotides mispair (eg C sits across from T) at extremely low frequency, which underlies the ability for DNA to store information, replicate that information during cell division, and to copy that information into RNA 28 3 Base Pairing In Dna The Watson Crick Model Chem
