Which one of the following is NOT a property of primary active transport (ATP-powered pumps)?
Question and options
Which one of the following is NOT a property of primary active transport (ATP-powered pumps)?
- Requires specific proteins
- Solute transported against its gradient
- Coupled to ATP hydrolysis
- Driven by movement of a cotransported ion down its gradient
Answer and explanation
Correct answer: D - Driven by movement of a cotransported ion down its gradient
ATP-powered pumps require specific proteins, move solute against its gradient and are coupled to ATP hydrolysis; being driven by a cotransported ion moving down its gradient describes secondary active transport (cotransport).
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