<prompt> Normal role of Micro RNA isGene RegulationRNA splicingInitiation of translationDNA conformational change  <response>: MicroRNA abbreted miRNA is a small non-coding RNA molecule containing about 22 nucleotides found in plants, animals, and some viruses, that functions in RNA silencing and post-transcriptional regulation of gene expression.miRNAs microRNAs are sho non-coding RNAs that regulate gene expression post-transcriptionally. They generally bind to the 3;-UTR untranslated region of their target mRNAs and repress protein production by destabilizing the mRNA and translational silencing. 