A subunit of nucleic acid (e.g, deoxyribonucleic acidDNA or ribonucleic acidRNA). It consists of a 5-carbon sugar, a phosphate group, and a nitrogenous base (e.g., thymine, guanine, cytosine, adenine, or uracil).

Also, they are integrated into the cofactors of enzymatic reaction.

Furthermore, in cellular signalling, they are involved as cyclic adenosine monophosphate and cyclic guanosine monophosphate.

Lastly, nucleotides can also be chemical energy sources in the form of adenosine triphosphate(ATP), a core of metabolism.
While working with fish DNA, he replaced a single nucleotide with a different nucleotide.

OR

The jogger used more of her ATP molecules when she ran.
by ZackThePlasmaLazerGunslinger February 20, 2011

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