In the operation of sodium-potassium ATPase:

In the operation of sodium-potassium ATPase:

In the operation of sodium-potassium ATPase:



  1. there is an obligatory coupling of sodium efflux and potassium influx.
  2. this transporter (or "pump") is electrogenic.
  3. phosphorylation and dephosphorylation are respectively associated with the sodium and potassium transport steps.
  4. the pump transports two potassium ions for every three sodium ions.
  5. All of the above

Answer: 5