Which is not involved in secondary active transport?

Question

Quizplus · Accepted Answer

Secondary active transport involves the use of an electrochemical gradient that was established by primary active transport (which requires energy). A coupled transporter (such as a symporter or antiporter) is required to move the target molecule(s) against the concentration gradient. The bilayer membrane is the physical barrier that separates the inside and outside of the cell. A concentration gradient is necessary for the movement of molecules across the membrane. However, a uniporter is not involved in secondary active transport, as it moves only one molecule across the membrane in a facilitated diffusion manner, without any coupling to an energy source or another molecule.

Which Is Not Involved in Secondary Active Transport