Used in molecular biology research to study RNA-protein interactions and immune response activation. Acts as a synthetic analog of viral RNA, triggering interferon production in cell cultures, which helps investigate antiviral defense mechanisms. Commonly employed in assays involving RNA-binding proteins and pattern recognition receptors like Toll-like receptors (TLR3, TLR7, TLR8). Also utilized as a control in experiments assessing RNA stability, degradation, and cellular uptake. Its polyanionic nature makes it useful for studying electrostatic interactions in nucleic acid systems.