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Related Flashcards
Cards In This Set
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Define Capsule
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A disctint thick gelatinous material that surrounds some types of microoganisms; sometimes required for an organism to cause disease
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Define Chemotaxis
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Directed movement of an organism in response to a certain chemical in the environment
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Define Cytoplasmic Membrane
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Thin, lipid bilayer that surrounds the cytoplasm and defines the cell boundary
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Define Endospore
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An extraordinary resistant dormant cell produced by some bacteria
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Define Flagellum
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A type of structure used for cell movement
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Define Gram-Negative bacteria
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Bacteria that have a cel wall characterized y a thin layer of peptidoglycan surrounded by an outer membrane; when Gram stained, these cells are pink
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Define Gram-Positive bacteria
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Bacteria that have a cell wall characterized by a thick layer of peptidoglycan; when gram stained, these cells are purple
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Define Lipopolysaccharide (LPS)
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Molecule that makes up the outer layer of the outer membrane of Gram-negative bacteria
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Define Peptidoglycan
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A macromolecule that provides strength to the cell wall; it is found only in bacteria
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Define Periplasm
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The gel-like material that fills the region between the cytoplasmic membrane and the outer membrane of Gram-negative bacteria
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Define Pili
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Cell surface structures that allow cells to adhere to certain surfaces; some types are involved in a mechanism of DNA transfer
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Define Plasmid
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Extrachromosomal DNA molecule that replicates independently of the chromosome
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Define Ribosome
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Structure involved in protein synthesis
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Define Transport Systems
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Mechanisms used to transport nutrients and other small molecules across the cytoplasmic membrane
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