RNA INTERFERENCE. Interfering RNA RNAi _ stage 3. In the cytoplasm of the cell_host, the double_stranded RNA is cut into fragments of 21_25 nucleotides by the Dicer protein type III ribonuclease. The RISC complex is visible in background. Interfering RNA is a mean for the cell to destroy the RNA parasites viruses RNA, transposons. The Dicer protein, a type III ribonuclease, fixes to the double_stranded RNA, and cleaves it into fragments of 21_25 nucleotides. Then, a proteic complex named RISC f