In a root cell,the plasma membrane is . . . . . . .

What is the 'pump' in the $Na^{+}-K^{+}$ pump?

Assertion : $A$ cell membrane shows fluid behaviour.
Reason : $A$ membrane is a mosaic or composite of diverse lipids and proteins.

The plasma membrane helps in:

Which components present in the plasma membrane result in it having a fluid structure?

In the structure of the cell membrane,$........$ is essential,and in determining the permeability of the cell membrane,$........$ mineral element is important.