"The chemical reactions and pathways involving a nucleoside, a nucleobase linked to either beta-D-ribofuranose (ribonucleoside) or 2-deoxy-beta-D-ribofuranose, (a deoxyribonucleotide), e.g. adenosine, guanosine, inosine, cytidine, uridine and deoxyadenosine, deoxyguanosine, deoxycytidine and thymidine (= deoxythymidine) [goid 9116] [evidence IEA]; The chemical reactions and pathways resulting in the formation of nucleotides, any nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the glycose moiety; may be mono-, di- or triphosphate; this definition includes cyclic-nucleotides (nucleoside cyclic phosphates) [goid 9165] [evidence IEA]; The chemical reactions and pathways involving purine bases, one of the two classes of nitrogen-containing ring compounds found in DNA and RNA, which include adenine and guanine [goid 6144] [pmid 8253776] [evidence TAS]; The process whose specific outcome is the progression of nervous tissue over time, from its formation to its mature state [goid 7399] [pmid 8253776] [evidence TAS]; The series of events required for an organism to receive an auditory stimulus, convert it to a molecular signal, and recognize and characterize the signal. Sonic stimuli are detected in the form of vibrations and are processed to form a sound [goid 7605] [evidence IEA]; The chemical reactions and pathways involving a nucleoside, a nucleobase linked to either beta-D-ribofuranose (ribonucleoside) or 2-deoxy-beta-D-ribofuranose, (a deoxyribonucleotide), e.g. adenosine, guanosine, inosine, cytidine, uridine and deoxyadenosine, deoxyguanosine, deoxycytidine and thymidine (= deoxythymidine) [goid 9116] [evidence IEA]; The chemical reactions and pathways resulting in the formation of a ribonucleoside monophosphate, a glycosamine consisting of a base linked to a ribose sugar esterified with phosphate on its glycose moiety [goid 9156] [evidence IEA]; The chemical reactions and pathways resulting in the formation of nucleotides, any nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the glycose moiety; may be mono-, di- or triphosphate; this definition includes cyclic-nucleotides (nucleoside cyclic phosphates) [goid 9165] [evidence IEA]; The chemical reactions and pathways resulting in the formation of substances, carried out by individual cells [goid 44249] [evidence IEA]"