BI-325
Antibiotic resistance
Biology · Secondary 3 · Medium · Antibiotic resistance
In a bacterial population exposed to an antibiotic, some bacteria have a gene that gives resistance. What happens to the frequency of this resistance gene over several generations if the antibiotic is used continuously?
- It increases because resistant bacteria survive and reproduce more.
- It decreases because antibiotics destroy all resistance genes.
- It stays the same because antibiotics affect all bacteria equally.
- It disappears once the patient’s symptoms improve.
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