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Julia D'Agostino, Paige Buchwald, Meghan Meenan
Bacteria Julia D'Agostino, Paige Buchwald, Meghan Meenan
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Overview Bacteria Classification and Characteristics:
Kingdoms of Bacteria Eubacteria Gram Staining
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Archaea Archaebacteria Unicellular and prokaryotic membranes
Methanogens Archaebacteria Unicellular and prokaryotic membranes The cell structures are cell walls without peptidoglycan Live in extreme temperatures (hot/cold) without oxygen Halophines Paige Buchwald
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Bacteria Eubacteria Cell type is prokaryote that is unicellular
Streptococcus Eubacteria Cell type is prokaryote that is unicellular Cell structure contains cell walls with peptidoglycan In all organisms that contain a nucleus Escherichia coil Paige Buchwald
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Criteria for identification and classification
Movement- self propelled Shape- influences the ability to acquire nutrients Size- range from microns/micrometers Obtain energy- photosynthesis, breaking down chemical compounds. Paige Buchwald
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3 different shapes Cocci are round cells, slightly flattened when they are next to one another. Bacilli are rod-shaped bacteria. Spirilla, bacteria which can range from slight curve corkscrew-like spiral. Paige Buchwald
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How Does Bacteria Move? Using the Flagella
Spitochaetes, responsible for rotation of the cell Gliding mobility Julia D'Agostino
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Structure of Eubacteria
Cell wall Cell membrane Pili Ribosome DNA Flagellum Julia D'Agostino
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Functions Cell wall- sturdy structure outside of the cell membrane of a plant cell Cell membrane- surrounds the cell that provides protection and support Peptidoglycan- substance that forms cell walls of bacteria Ribosome- Protein factories Julia D'Agostino
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Functions Flagellum- a whip-like structure that allows bacteria to swim DNA- Carrier of genetic information Pili- A hair-like appendage on the surface of Bacteria Julia D'Agostino
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What is Gram Staining? Tells the difference between gram positive and negative organisms Allows doctors to identify diseases in bacteria Meghan Meenan
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How it's done Four step process The primary stain Iodine Decolorizer
The counterstain Meghan Meenan
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Gram Positive Staining
Stains cell purple because the thick layer of peptidoglycans Bacteria is present in cell Cell takes in crystal violet Color remains in cell after decolorizing Meghan Meenan
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Gram Negative Staining
The cell turns red because thin layer of peptidoglycans Bacteria is not present in cell Cell also takes in crystal violet Cell wall can't hold color Meghan Meenan
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ABC's Which of the following characteristics belong to the Archaea kingdoms of bacteria? Contain walls without peptidoglycan Contain walls without peptidoglycan Are in organisms with a nucleus A Paige Buchwald
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A ABC's Which is a shape of bacteria? Spirilla Archea Eubacteria
Paige Buchwald
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ABC's What structure is a whip-like structure that allows bacteria to swim? A. Flagella B. Pili C. Peptidoglycan D. Cell membrane A Julia D'Agostino
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ABC's What is the function of the cell membrane? A. Allow the cell to move B. Make proteins C. Surround and protect the cell D. Carry genetic information C Julia D'Agostino
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ABC's What color does the cell turn in Gram Positive Staining? A. Red B. Yellow C. Black D. Purple D Meghan Meenan
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B ABC's What does Gram Positive and Negative Staining Determine?
A. Type of bacteria B. Presence of bacteria C. Color of cell D. Size of cell B Meghan Meenan
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Overview Bacteria Classification and Characteristics:
Kingdoms of Bacteria Eubacteria Gram Staining
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