Question

$N{a}^{+}$ -$K^{+}$ dependent ATPase activity helps in transport of

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

Answer 1

The correct option is A $K^{+}$ inward, $N{a}^{+}$ outward

$N{a}^{+}$-$K^{+}$ ATPase transport sodium out of the cell with the simultaneous pumping of potassium inside the cell against the concentration gradient. The pumping against concentration gradient uses the energy of ATP making the process an active transport (passive transport occurs down the concentration gradient without an expenditure of energy). So, the correct answer is option A.