May not be right, but because of Oxygen and the growing of new skin? We rub our skin without noticing and it will become frail and rub off, creating new skin
Chargaff's rules state that DNA from any species of any organism should have a 1:1 stoichiometric ratio of purine and pyrimidine bases, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine.
