ABSTRACT
DNA is characterized by a sugar, deoxyribose, more particularly the 2-
–deoxyribofuranose. This molecule is associated with a nitrogenous base and a molecule of phosphoric acid. Groups belonging to deoxyribose-phosphate are bound by phosphodiester bonds between the 3
and 5
carbons belonging to two successive deoxyriboses (Figure 1.1).
