Question

Sodium-potassium pump is

• A. A hormone
• B. An enzyme
• C. A carrier protein
• D. An organelle

Answer 1

Answer: (C)

A carrier protein

The sodium-potassium pump is an important contributor to action potential produced by nerve cells. This pump is a transport protein because the ATP interactions phosphorylate it and causes a change in its conformation. Sodium-potassium pump transports three $N{a}^{+}$ ions to the outside of the cell and the transports two $K^{+}$ ions to the inside.