DNA-templated transcription, elongation RNA elongation The extension of an RNA molecule after transcription initiation and promoter clearance at a DNA-dependent RNA polymerase promoter by the addition of ribonucleotides catalyzed by an RNA polymerase. [database_cross_reference: PMID:15020047][database_cross_reference: GOC:txnOH][database_cross_reference: PMID:18280161][database_cross_reference: GOC:mah] http://purl.obolibrary.org/obo/go.owl transcriptional elongation, DNA-dependent DNA-dependent transcription, elongation transcription elongation, DNA-dependent RNA biosynthetic process