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ATP-Driven Active Transport
Grade Level
AP Biology
APB.153 ATP-Driven Active Transport
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A bacterial ABC transporter exports an antibiotic from the cytoplasm. A mutation in its ATPase domain lowers antibiotic resistance. Which mechanism best explains the change?
A
The mutation increases passive diffusion of antibiotic out of the cell
B
Reduced ATP-driven efflux allows more antibiotic to remain inside the cell
C
The mutation converts the antibiotic into ATP
D
The transporter begins importing water instead of binding antibiotic
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