Question

The function of "sodium pump" is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of this pump?

• A. $K^{+}$
• B. $F{e}^{2+}$
• C. $M{g}^{2+}$
• D. $C{a}^{2+}$

Answer 1

The correct option is A $K^{+}$

The function of "sodium pump" is a biological process operating in each and every cell of all animals.

$K^{+}$ ion, a biologically important ions is also a constituent of this pump.
$N{a}^{+}$ is a major cation present in blood plasma (outside cells).
$K^{+}$ is major cation present in cytoplasm (inside the cells).

The sodium pump transfers the sodium ions from the intracellular fluids to the extracellular fluids with the help of certain proteins called ‘carrier proteins’. At the same time, the sodium pump also transfers potassium ions into the intracellular fluids from the extracellular fluids.

Thus, option (a) is correct answer.