template-free RNA nucleotidyltransferase activity
Catalysis of the reaction: nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1); the addition of a terminal nucleotide to an RNA molecule in the absence of a nucleic acid template.
GO:0016779
nucleotidyltransferase activity
is_a
GO:0140098
catalytic activity, acting on RNA
is_a