Adefective na+/k+ atpase pump is isolated from a plasma membrane and studied. careful measurements in the laboratory determine that the pump is able to hydrolyze atp and transports 3 na+ ions across the plasma membrane. the pump is also able to bind 2 k+ ions with high affinity. however, the pump is unable to shuttle k+ ions across the plasma membrane. based on these observations, what is the most likely cause of the defect in this pump?
a. the defective pump is unable to release na+ ionsb. the defective pump is unable to bind k+ ionsc. the defective pump is unable to bind atpd. the defective pump is locked into a rigid conformation and is unable to undergo conformational changese. the defective pump is unable to release phosphate