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10 Cards in this Set
- Front
- Back
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Are endotoxins secreted from cells?
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NO
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Are endotoxins used as antigens in vaccines?
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no, they don't produce protective immune response
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Are exotoxins heat stable?
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no, destroyed rapidly at 60C (exception: Staphylococcal enterotoxin)
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Are exotoxins secreted from cells?
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YES
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Are exotoxins used as antigens in vaccines?
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Yes, TOXOIDS are used as vaccines
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Describe the chemical composition of peptidoglycan.
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Sugar backbone with cross-linked peptide side chains.
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Describe the major components of a G- cell wall.
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inner and outer lipid bilayer membranes - thin layer of peptidoglycan - periplasmic space - contains lipopolysaccharide, lipoprotein and phospholipid
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Describe the major components of a G+ cell wall.
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one lipid bilayer membrane - thick layer of peptidoglycan - contains teichoic acid
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Describe the process of conjugation.
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DNA transfer from one bacterium to another.
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Describe the process of transduction.
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DNA transfer by a virus from one cell to another
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