Monovalent ions (e.g.,$Na^+, K^+$) $A$ the membrane permeability,while divalent ions $B$ the same. Complete the given statement by filling in the appropriate option for ($A$ and $B$).

Identify $X, Y, Z$ from the given figure of the cell membrane:

Which of these is a Semipermeable Membrane $(SP)$ and which is Selectively Permeable $(SL)$? : Plasmalemma

The most accepted Fluid Mosaic Model describes the cell membrane as a quasi-fluid structure where lipids and integral proteins are arranged in a mosaic pattern. In recent years,this model has been refined. Which of the following statements is incorrect regarding this model?

What are $P$ and $Q$ in the given structure of the cell membrane?

Select the correct statement from the following regarding the cell membrane.