Question

By which mechanism, the salt resistant plants get rid off excess $N{a}^{+}$ ions to the outer side through the roots.

• A. $H^{+}-$ ATPase uniport system
• B. $N{a}^{+}-$ uniport system
• C. $H^{+}-C{l}^{-}$ symport system
• D. $N{a}^{+}-H^{+}$ antiport system.

Answer 1

The correct option is D $N{a}^{+}-H^{+}$ antiport system.

An antiporter is an integral membrane protein involved in secondary active transport of two or more different molecules or ions across a phospholipid membrane such as the plasma membrane in opposite direction. The sodium-hydrogen antiporter or sodium-proton exchanger (Na+/H+) is a membrane protein that transports Na+ into the cell and H+out of the cell(antiport).

So the correct option is " Na+-H+ antiport system".