which nucleotide molecule functions as an energy carrier in the cell?
Structural Biochemistry/ATP. Adenosine triphosphate (ATP) is a nucleotide that consists of an adenosine and a ribose linked to three sequential phosphoryl (-PO32-) groups via a phosphoester bond and two phosphoanhydride bonds. ATP is the most abundant nucleotide in the cell and the primary cellular energy currency in all life forms. The primary biological importance of ATP rests in the large amount of free energy released during its hydrolysis.