Which one of the following is not applicable to RNA?

Chargaff’s rule is applicable to the structure of DNA. In 1950, Erwin Chargaff of Columbia University reported an important finding that delivered the final blow to the tetranucleotide theory and provided vital information about DNA structure.The principle of complementarity governs the process of transcription.RNA contains heterocyclic nitrogenous bases like adenine, guanine, cytosine, and uracil.RNA like DNA has 5' phosphoryl and 3' hydroxyl ends.