siRNA

siRNA, or small interfering RNA, is a natural molecule that helps regulate gene activity in cells. It functions by binding to specific messenger RNA (mRNA) molecules, which carry genetic instructions for making proteins. When siRNA attaches to its target mRNA, it triggers its destruction, effectively preventing the production of certain proteins. This process is important for controlling gene expression, defending against viruses, and has been harnessed in medicine and research to selectively turn off specific genes. In short, siRNA acts as a precise molecular switch to control gene activity within cells.