Module 7: Difference Between Prokaryotic and Eukaryotic cell

• Kinds of cells

  • Prokaryotes
  • Eukaryotes
• Prokaryotes


  An organism made of one cell that does not have a nucleus or other organelles covered by a membrane
• Types of prokaryotes

  • Bacteria
  • Archaea
• Bacteria


  The most common prokaryotes
• Bacterium is the singular form of bacteria
• Bacteria are the smallest known cells
• Bacteria characteristics

  • No nucleus
  • Circular DNA shaped like a twisted rubber band
  • No membrane-bound organelles
  • A cell wall outside the cell membrane
  • A flagellum, a tail-like structure that some bacteria use to help them move
• Archaea


  Singular, archaeon
• Archaea characteristics

  • No nucleus
  • No membrane-bound organelles
  • Circular DNA
  • Has cell wall
• Some archaea live in places where no other organisms could live
• Some archaea can live in the boiling water of hot springs
• Some archaea can live in toxic places such as volcanic vents filled with sulfur
• Some archaea can live in very salty water in places such as the Dead Sea
• Eukaryotes

  Eukaryotic cells are the largest cells
• Eukaryotic cells are about 10 times larger than bacteria cells
• Eukaryotic cells can have one cell or many cells