Glycosidic bond

A glycosidic bond is formed between a hemiacetal group of a sugar molecule (such as glucose) and an alcohol functional group to form an acetal.

A N-glycosidic bond is formed between the hemiacetal group of a sugar molecule (such as ribose) and a N-H group on an aromatic ring. An example of this is the bond between a nitrogenous base and the deoxyribose molecule in DNA.