RNA processing:
In the prokaryotes, RNA transcribed from protein-coding genes or messenger RNA, mRNA, need little or no changes prior to translation. In reality, several mRNA molecules start to be translated even before RNA synthesis has finished. Moreover, ribosomal RNA (rRNA) and transfer RNA (tRNA) are synthesized as precursor molecules which do need post-transcriptional processing.
![81_RNA processing.png](https://www.expertsmind.com/CMSImages/81_RNA%20processing.png)
Figure: A typical hairpin structure formed by the 3′ end of an RNA molecule during termination of transcription.