bio 205 chapter 3 powerpoint
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BIO 205
Chapter 3
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Three Domain System
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Prokaryote/Eukaryote Similarities
Myxobacteria Fruiting Body
Prokaryotes carry out many of thesame cellular processes aseukaryotes.
Myxobacteria live in a socialcommunity dependent on cell-to-cellinteraction and communitcation.
Many prokaryotes live in communalassociations called biofilms.
Homeostasis is an organisms ability
to maintain a stable internal state.
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Ribosomes are involved in protein synthesis
Metabolism occurs in the cytoplasm
Both prokaryotes and eukaryotic cells have internalcompartments
All organisms have similar genetic organizationwhereby heredity material is expressed
Prokaryotes and Eukaryotes: The Similarities inOrganizational Patterns
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Protein/lipid transport in eukaryotes is carried out bythe endoplasmic reticulum and golgi apparatus
Prokaryotes and Eukaryotes: The StructuralDistinctions
Eukaryotes have membrane-enclosed organelles
Mitochondria performcellular respiration ineukaryotes
Both eukaryotes andprokaryotes can performphotosynthesis
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Many prokaryotes and eukaryotes have a cell wall tohelp maintain water balance
The eukaryotic cytoskeleton gives the cell structureand transports materials within the cell
Prokaryotes and Eukaryotes: The StructuralDistinctions Continued:
Both eukaryotes and prokaryotes use flagella formotility, though the flagella differ structurally andfunctionally in the two groups
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Gene expression in archaea is more similar to that ofeukaryotes than prokaryotes
DNA replication in archaea is more similar to that of
eukaryotes than prokaryotes
The cell walls of archaea are made of pseudomurein,
or some other combination of proteins andcarbohydrates, not peptidoglycan like prokaryotes
The plasma membranes of archaea differ from thoseof both prokaryotes and eukaryotes
Bacteria and Archaea: The Structural Distinctions
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A Bacterial CellA Prokaryotic Cell
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A Eukaryotic CellA Eukaryotic Cell
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Microscopy
Most bacterial and archaeal cells are 1-5 micrometers(m) in length
Most Microbial Agents Are In the Micrometer Size Range
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The lens system must have high resolving power to see the specimen clearly
Light microscopes usually have at least 3 lenses: low-power, high-power, and
oil immersion
Visible light passes through multiple lenses and through the specimen
Light Microscopy is Used to Observe Most Microorganisms
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The Oil Immersion Lense
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Gram Stain Technique
Negative Stain Technique
Simple Stain Technique
Staining Techniques to Provide Contrast
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Simple and Negative StainsSimple and Negative Stains
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Gram Stain Technique
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A mixture of Gram + and Gram - bacteria
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End of Chapter 3
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