Structures and Functions of Nucleotides

A nucleoside is formed from the linkage of a sugar with a nitrogen-containing base. 

The bases that make up the physiologically relevant nucleosides all have ring structures. 

Ribose and 2-deoxyribose are the main sugars found in nucleosides and nucleotides. 

Nucleotides are nucleosides to which one, two, or three phosphate groups have been added to the sugar. 

The bonds that interconnect the phosphate groups yield hig i energy when they are broken or hydrolyzed. 

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