FIGURE 1.

Schematic illustration showing different types of RNA in mammalian cells mRNA, miRNA, siRNA, and lnRN. (A) Premature mRNA gets exported to the cytoplasm then translated into protein by ribosomes. (B,C) pre miRNA and pre siRNA are produced in the nucleus and then gets exported to the cytoplasm then processed by Dicer followed by RISC complex formation, finally the miRNA or siRNA binds to the target sequence by complementation. This causes the degradation of the target RNA or translation block. (D) lncRNA are produced in the nucleus then exported into the cytoplasm in which they can regulate the gene expression (Created with BioRender.com).