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RNA interference (RNAi) is a conserved cellular mechanism that regulates gene expression by targeting specific mRNA molecules for degradation or translational repression. The process begins with the presence of double-stranded RNA (dsRNA) in the cell, which can originate from viruses, transposons, or experimentally introduced small RNAs. This dsRNA is recognized and cleaved by the RNase III enzyme Dicer into small ____ ___ ________ _____ ________ ________ ________ __________ ___.
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