3'-5'-exoribonuclease activity 3'-5' exoribonuclease activity Catalysis of the sequential cleavage of mononucleotides from a free 3' terminus of an RNA molecule. EC:3.1.13.- Reactome:REACT_102966 Reactome:REACT_108214 Reactome:REACT_20588 Reactome:REACT_33991 Reactome:REACT_34078 Reactome:REACT_78363 Reactome:REACT_82118 Reactome:REACT_88115 Reactome:REACT_89880 Reactome:REACT_92153 Reactome:REACT_93499 Reactome:REACT_95913 Reactome:REACT_95921 Reactome:REACT_96267 Reactome:REACT_99422 exonuclease activity exoribonuclease activity, producing 5'-phosphomonoesters