Dinucleotide is obtained by joining two nucleotides together by phosphodiester linkage. Between which carbon atoms of pentose sugars of nucleotides are these linkages present ?

Options

A. 5' and 3'
B. 1' and 5'
C. 5' and 5'
D. 3' and 3'

Answer

A

Explanation

Nucleoside Species formed by the attachment of a base to 1. position of sugar is known as nucleoside. The sugar carbon are numbered as 1., 2., 3., …to distinguish them from bases

Nucleotide Species formed by attachment of phosphoric acid to nucleoside at 5. position of sugar nucleotide

Dinucleotides are formed by phosphodiester linkage between 5. and 3. carbon atoms of the pentose sugar.