The process of sucking of fluid from the cell surface is called as

The model given by Singer and Nicolson in $1972$ was the . . . . . . for the plasma membrane.

The cell membrane is primarily composed of:

Biological membranes are composed of

$A$: Lipids are arranged within the cell membrane with the hydrophobic tails towards the inner part.
$R$: This ensures that the non-polar tail of saturated hydrocarbons is protected from the aqueous environment.

Molecules that are too large to pass through the pores of a cell membrane may enter the cell by a process known as