Viruses and Bacteria

• Virus is

  Covered by: Protein coat

  Cell membrane: no

  Cytoplasm: no

  Genetic material: DNA or RNA – only a few genes

  Living or not? Non-living unless in host
• Bacteria is

  Covered by: Cell wall

  Cell membrane: Yes

  Cytoplasm: Yes

  Genetic material: DNA – enough for several 100 genes

  Living or not? Living
• 2 examples of virus structure: bacteriophage and influenza