virus and bacteria
Post on 23-Feb-2016
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Virus and Bacteria
What are Microorganisms?
Cells
Prokaryotic Cells• No Nucleus• No membrane bound
organelles• Single celled:• Archaea/bacteria
Eukaryotic Cells• One or many celled
organisms• Nucleus with membrane• Body cell
Characteristics of Bacteria
• Prokaryotes • Many are consumers• Some are consumers , decomposers or
producers• Single celled• Round, spiral or rod shaped
How Bacteria reproduce
Binary Fission• Step 1: genetic information
is copied• Step 2: cell membrane
begins to split• Step 3: new cell wall is
formed• Step 4: Two identical
bacteria cells are formed.• Asexual reproduction
exchanging DNA• Conjugation• During
conjugation a plasmid is transferred from one bacteria to another
Characteristics Viruses
• Non-living can not replicate on its own• Made of protein coat and genetic material• Protein coat gives virus its shape• Smaller than bacteria• Do Not perform any life functions• Can only replicate inside a cell
Virus Replication
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