Question

$N{a}^{+},K^{+}$ dependent ATP ase activity helps in transport of:

• A. $K^{+}$ inward, $N{a}^{+}$ outward
• B. $K^{+}$ inward only
• C. $N{a}^{+}$ inward only
• D. $K^{+}$ outward, $N{a}^{+}$ inwar

Answer 1

Answer: (A)

The cell membrane of the body have powerful $N{a}^{+}-K^{+}$pump that continually pumps sodium ions to the outside of the cell and potassium ions to the inside. In sodium potassium pump $N{a}^{+}-K^{+}$dependent ATP ase enzyme helps in translocation of three $N{a}^{+}$ions out of the cell for every two $K^{+}$ions pumped into the cell. ATP powers the changes in conformation by phosphorylating the transport protein.