APFIVE Antibiotic Stress and Bacterial Mutation
In a study of antibiotic resistance, researchers observed that bacteria exposed to sublethal doses of antibiotics showed higher mutation rates than control bacteria. Which of the following best explains this phenomenon?
A
Horizontal transfer of mutated genes between bacteria
B
Direct mutagenic effect of antibiotics on bacterial DNA
C
Stress-induced activation of error-prone DNA polymerases
D
Selection for pre-existing hypermutator strains
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