Prokaryotic cells are identified by the absence of a membrane-bound nucleus. Their genetic material, which consists of a single circular DNA, is found in the nucleoid, an irregularly-shaped central region of the cell. 

These are 10 examples of prokaryotic cells:

• Escherichia Coli Bacterium
• Cyanobacteria
• Lactobacillus Acidophilus
• Streptococcus Bacterium
• Streptococcus Pyogenes
• Bacillus Cereus
• Bacillus Anthracis
• Archaea
• Corynebacterium diphtheria
• Sulfolobus acidocaldarius archaebacteria