Why is the Na⁺/K⁺ pump considered "primary" active transport?
- A
It uses sunlight energy directly as its source of power for transport
- Bcheck_circle
It directly hydrolyzes ATP to drive transport against a gradient
- C
It depends on a preexisting ion gradient maintained by another transporter
- D
It is the most abundant transport pump found in eukaryotic plasma membranes
Explanation
Primary active transport directly couples ATP hydrolysis to transport. Secondary uses an existing ion gradient (built by primary pumps) as the energy source.