Explain transcription unit with the help of schematic structure of a transcription unit.NEED FAST.EXAM.PLZ

A transcription unit is a stretch of DNA that is to be transcribed into RNA molecule. A transcription unit encloses at least one gene. If the gene encodes protein, then after transcription the unit results in mRNA that in turn becomes protein after translation.   The process of synthesising proteins from the DNA template is known as protein synthesis; where, the process of conversion of DNA into RNA is known as transcription and the process of conversion of RNA into polypeptide chain is known as translation.

•  Transcriptional Unit- A transcriptional unit has primarily three regions:
  Promoter – Marks the beginning of transcription; RNA polymerase binds here
  Structural gene – Part of the DNA that is actually transcribed
  Terminator – Marks the end of transcription​