11 Jun Washington BIOLOGY 180 -What is the molecular mechanism
Question
1.What is the molecular mechanism of antibiotic resistance?
Certain enzymes change the drug’s structure (break it down).
None of the choices.
Molecules called pumps transport the drug out of the cell.
Any of the choices, EXCEPT for the choice “None of the choices.”
Certain versions of a target molecule may not be affected by the drug.
2. Did alleles for drug resistance occur in bacterial populations that afflict humans, prior to the widespread use of antibiotics in medicine and agriculture?
Yes—most alleles for drug resistance are carried on plasmids.
No—mutations for drug resistance occur in response to antibiotic use.
No—there is no point in having alleles for drug resistance if there is no selective advantage.
Yes—alleles for resistance arise due to random mutation, so are always present.
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