Bacteria cells

• Name the different structures of bacteria cell (9)

  Cell membrane, cell wall, cytoplasm, chromosomal DNA, flagella, slime capsule, plasmid, pili, ribosomes
• What structures are only in some cells?

  plasmid, flagella, capsule
• Describe a prokaryotes size.

  They're much smaller then eukaryotes normally ranging from 0.1 to 10 nano meters
• Describe the role of the cell wall.

  A physical barrier that excludes certain substances and protects against mechanical damage and osmotic lysis.
• Describe the role of the capsule.

  It's a mucilaginous slime that protects bacterium from other cells and helps groups of bacteria to stick together for further protection.
• Describe the role of the cell-surface membrane

  Partially permeable membrane that controls the entry and exit of chemicals.
• Describe the role of circular DNA.

  It possesses the genetic information for the replication of cells.
• Describe the role of plasmids.

  They can reproduce themselves independently possesses genes that may aid the survival of bacteria in adverse conditions, e.g. produces enzymes that break down antibiotics.