part of RNA-templated transcription RNA-directed RNA polymerase activity https://github.com/geneontology/go-ontology/issues/23750 transcriptase RdRP activity EC:2.7.7.48 RNA-dependent RNA replicase activity Reactome:R-HSA-9828639 molecular_function Reactome:R-HSA-9834736 Reactome:R-HSA-9681840 Reactome:R-HSA-168280 Reactome:R-HSA-192832 Catalysis of the reaction: nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1); uses an RNA template, i.e. the catalysis of RNA-template-directed extension of the 3'-end of an RNA strand by one nucleotide at a time. Reactome:R-HSA-9922955 Reactome:R-HSA-168301 Reactome:R-HSA-192851 RNA synthetase activity RNA nucleotidyltransferase (RNA-directed) activity Reactome:R-HSA-9923068 Reactome:R-HSA-9694581 Reactome:R-HSA-9694549 Reactome:R-HSA-9694344 Reactome:R-HSA-9834719 Reactome:R-HSA-9685681 Reactome:R-HSA-9694506 Reactome:R-HSA-9694605 RNA-directed 5'-3' RNA polymerase activity MetaCyc:RNA-DIRECTED-RNA-POLYMERASE-RXN Reactome:R-HSA-192916 Reactome:R-HSA-9681674 Reactome:R-HSA-9682465 Reactome:R-HSA-9681651 GO:0003968 Reactome:R-HSA-9682563 RNA-dependent RNA polymerase activity Reactome:R-HSA-192624 Reactome:R-HSA-9685639 Reactome:R-HSA-9694792 RNA replicase activity Reactome:R-HSA-9837511 Reactome:R-HSA-9694277 5'-3' RNA polymerase activity