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BIO 260 Chapter 20-Questions and Answers
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BIO 260 Chapter 20-Questions and Answers
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BIO 260 Chapter 20-Questions and AnswersA medication that only targets Gram-negative bacteria. Correct Ans-A medication causing
greater harm to a pathogen than to the host.
The first example of an antimicrobial drug synthesized in the laboratory was
Salvarsan.
erythromycin.
Erlichsan.
penicillin.
sulfa. Correct Ans-Salvarsan.
Folic acid is ultimately used in the synthesis of Correct Ans-coenzymes
What are two advantages of automated tests used to determine antimicrobial susceptibility?
They produce results more quickly than conventional tests.
They take longer to perform BUT they give fewer false results.
, BIO 260 Chapter 20-Questions and Answers
They are cheaper than conventional tests AND they give more accurate results.
They are easier to perform.
They produce results more quickly than conventional tests AND they are easier to perform.
Correct Ans-They produce results more quickly than conventional tests AND they are
easier to perform.
Antimicrobial resistance can be due to spontaneous mutation or gene acquisition.
True or False Correct Ans-True
An antibiotic made by microorganisms and modified by chemists is called
semi-catabolic.
catabolic.
anti-metabolic.
semi-synthetic.
synthetic. Correct Ans-semi-synthetic.
Beta-lactam drugs are only effective against growing bacteria.
, BIO 260 Chapter 20-Questions and Answers
True or False Correct Ans-True
Which is the correct definition of selective toxicity?
The range between the therapeutic dose and the toxic dose of a medication.
A medication causing greater harm to a host than to a pathogen.
A medication causing greater harm to a pathogen than to the host.
The lowest dose of a medication toxic to the pathogen.
An elderly patient comes to see you complaining of a very painful rash. When he lifts his shirt,
you see that he has a rash of small blisters (vesicles) on one side of his back. You think he
likely has shingles, caused by varicella-zoster virus (VZV), a double-stranded DNA virus that
belongs to the Herpesviridae family. You explain this to your patient, who asks you to please
give him an antibiotic for his infection. You tell him an antibiotic will not help him, and give
him information on virus infections and their treatment.
Antibiotics are effective in treating viral infections provided that they are given early in the
course of illness.
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