Prokaryotes

A prokaryotic cell is a cell which doesn't have a nucleus, while eukaryotic cells have nuclei. There are some differences between prokaryotic cells and eukaryotic cells which are relevant to gene recognition. In prokaryotic cells most of the DNA sequence is coding for protein. For example, almost 70% of the genome of the bacterium H.influenzea is coding. Also, each gene is one continuous stretch of bases. That is, there are no introns in the coding region.

  

Figure: Typical prokaryotic gene structure at DNA level (not to scale) [].