Answer
Gene Regulation: MicroRNAs (miRNAs) are small non-coding RNA molecules that play a crucial role in regulating gene expression. They bind to the 3' untranslated region (UTR) of target messenger RNAs (mRNAs), leading to either mRNA degradation or translational inhibition. This process allows miRNAs to fine-tune gene expression, controlling various cellular processes such as development, differentiation, and metabolism.