1.1.10 The phosphate group is esterified to the-OH group on the 5 carbon of the deoxyribose rin g l..11A nucleotide lacking the phosphate part is called a nucleoside. 1.1.12 The four nucleoside units in dna are called deoxyadenosine, deoxyguanosine, deoxythymidine, and deoxycytidine. 1.1.2 The nitrogenous base can be adenine (A), guanine(G), cytosine(C), or thymine(T) (uracil (U) in RNA1.1.10 The phosphate group is esterified to the -OH group on the 5’ carbon of the deoxyribose ring. 1.1.11 A nucleotide lacking the phosphate part is called a nucleoside. 1.1.12 The four nucleoside units in DNA are called deoxyadenosine, deoxyquanosine, deoxythymidine, and deoxycytidine. 1.1.2 The nitrogenous base can be adenine (A), guanine (G), cytosine (C), or thymine (T) (uracil (U) in RNA)