Microbiology Slides

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Microbiology Slides

• Bio 104 Practical

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(No Transcript)
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The Structure of the Prokaryote Cell

• Small size ( 0.5 to 2um)
• Large surface area to volume ratio
• A variety of shapes
• Outer cell wall- very thick made of specialized
  molecules
• Cell membranes may have a different constituency
  of molecules from eukaryote cells
• Ribosomes smaller
• No organelles, no nuclear membrane
• 1 ds circular loop of DNA

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Shapes of the Bacteria

• Bacillus
• Coccus
• Vibrio
• Spirillum
• Spirochete
• Pleiomorphism- Some bacterial shapes vary
  within a culture. This can occur when the
  nutrients are used and wastes have built up

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Cell Morphology
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Arrangement of bacteria

• Groups of two- diplo
• Chains- strepto
• Large groups- like grape clusters- staphylo
• Division on 3 planes- sarcinae- 8 cells
  arranged in a cube
• Division on two planes produces tetrads

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Bacterial Shapes
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Diplococcus
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Streptobacilli
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Spirillum
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Spirochetes
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Streptobacilli
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Streptococcus pyogenes- strep throat
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Staphylococcus
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Staphylococcus