Test: GRE Subject Test: Biology

In a small village, a doctor over-prescribed Ciprofloxin (an antiobiotic) to his patients. The result was that the majority of his patients had developed a new strain of bacteria that had become resistant to Ciprofloxin. 

1.

What is a possible route that may have caused these bacteria to become antibiotic resistant?

The bacteria learned to metabolize the antibiotic

An antibiotic resistant gene was passed on through the plasmids in a group of antibiotic resistant bacteria

The antibiotic lost its potency

The antibiotic resistant bacteria had the ability to degrade the antibiotic in their lysosomes

The bacteria developed a way to prevent the antibiotic from entering into their cells

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