• Pengguna Brainly
Purine and pyrimidine nucleotides fill a variety of metabolic roles. They are the “energy currency” of the cell. In some cases, they are signaling molecules, acting like hormones directly or as transducers of the information. They provide the monomers for genetic information in DNA and RNA.
1. Components of nucleic acids (DNA, RNA) 
2. Carriers of chemical energy in the cell (eg., ATP, GTP) 
3. Components of cofactors (eg., NAD, FAD) 
4. Intermediates in cellular communication and signal transduction 
(eg., cAMP, cGMP) 
5. Donor substrates for glycobiology (eg. UDPG)