MicroBiology

micro RNA (miRNA) form the important element in genetics. They are the single stranded RNA molecules which are only 21-23 nucleotides in length and regulate the gene expression. miRNA get coded by the genes which are transcribed from the DNA but they are not translated into the protein i.e the non-coding RNA; instead they get processes from the pri-miRNA (which are also known as the primary transcript) to the short stem loop structures which are the pre-miRNA and finally to the functional miRNA. The mature molecules of miRNA are partially complimentary to either one or more messenger RNA molecule and their main function is to down regulate the gene expression.