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Chapter 15 Microbiology. Quiz
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Multiple Choice Questions
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5) The Limulus amoebocyte assay is used to detect minute amounts of endotoxin in drugs and medical devices.
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True
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False
10) Many pathogens use the same portal for entry and exit from the body
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True
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False
3) The M protein enhances the virulence of Streptococcus by preventing phagocytosis.
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True
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False
4) In A-B exotoxins, the A component binds to the host cell receptor so that the B component can enter the cell.
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True
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False
2) Biofilms provide pathogens with an adhesion mechanism and aid in resistance to antimicrobial agents.
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True
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False
9) Infections with some viruses may induce chromosomal changes that alter the growth properties of host cells.
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True
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False
6) Cytopathic effects, such as inclusion bodies and syncytium formation, are the visible signs of viral infections.
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True
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False
1) In general, the LD50 for exotoxins is much greater than the LD50 for endotoxins.
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True
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False
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