Explain the emergence of multiple resistance and how careful antibiotic use can reduce selective pressure.
Tę umiejętność sprawdza 10 zadań wzorowanych na arkuszach IB z lat 2022–2025.
A bacterial isolate is no longer killed by an antibiotic that inhibited an earlier isolate of the same species. Which biological change could explain the difference? A. A mutation has altered a bacterial target so the drug binds less effectively B. The…
Outline likely health benefits of universal vaccination against R other than a reduced incidence of ARI.
Explain how natural selection could increase the frequency of resistance in the bacterial population.
Suggest why strain B7 grows at the different antibiotic concentrations.
Suggest why strain B7 grows at the different antibiotic concentrations.
Why can repeated antibiotic use increase the frequency of resistance in a bacterial population? A. The antibiotic purposefully gives every bacterium a useful mutation B. Natural selection changes the antibiotic molecule into food C. Susceptible bacteria are…
Why can repeated antibiotic use increase the frequency of resistance in a bacterial population? A. The antibiotic purposefully gives every bacterium a useful mutation B. Natural selection changes the antibiotic molecule into food C. Susceptible bacteria are…
Which explanation is consistent with the trend in this constructed bacterial dataset? A. The antibiotic gives every bacterium an inherited need to resist it B. Resistance means that bacteria have human-like acquired immunity C. Resistant variants can survive…
A bacterial strain develops a mechanism that destroys most DNA arriving from other species. What is a likely effect on acquisition of antibiotic resistance through horizontal gene transfer? A. It becomes less frequent because incoming resistance genes are less…
Which processes can make pathogen control more difficult? I. Selection of antibiotic-resistant bacteria. II. Genetic changes producing new pathogen variants. III. Antibiotics acting as an effective treatment against every virus. A. I and II B. II and III C. I…
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