You discover a new protein that transports ions across the m

You discover a new protein that transports ions across the membrane. You do an experiment to deplete the cells\' ATP supply. The protein is unable to transport ions. Is this protein a pump or an ion channel? Explain.

Solution

The discovered transmembrane protein is Pump. Because membrane transport proteins are 2 types. Passive transporters that includes Channels which does not require ATP energy. Another type are active transporters, that requires ATP energy. Channels transport ions along the concentration gradient and facilitates. Where as pumps transport ions against the concentration gradient and facilitates existence of the polarization.