Posttranscriptional gene silencing by dsRNA occurs when RISC promotes the binding of Posttranscriptional gene silencing by d s R N A occurs when RISC promotes the binding of blank to complementary sequence on m R N A. The result of binding prevents blank of the m R N A by blank or by blank. to complementary sequence on mRNA. The result of binding prevents Posttranscriptional gene silencing by d s R N A occurs when RISC promotes the binding of blank to complementary sequence on m R N A. The result of binding prevents blank of the m R N A by blank or by blank. of the mRNA by Posttranscriptional gene silencing by d s R N A occurs when RISC promotes the binding of blank to complementary sequence on m R N A. The result of binding prevents blank of the m R N A by blank or by blank. or by