How is the plasma membrane of a cell organized?
question 15 options:

one layer of phospholipids, through which proteins freely move

one layer of phospholipids, which are laid out end-to-end, with a hydrophobic tail touching a hydrophilic head

two layers of phospholipids, each of which has its hydrophilic side turned inward

two layers of phospholipids, with their polar hydrophilic heads facing away from each other

The plasma membrane of a cell is organised as:

Two layers of phospholipids, with their polar hydrophilic heads facing away from each other.

Explanation:

Plasma membrane forms the external boundary of the cell.The Plasma membrane is selectively permeable and allows only selected solute molecules to pass through it.The Basic structure of the plasma membrane is the lipid bilayer.This bilayer is composed of two leaflets of amphipathic lipid molecule.The polar heads of the molecules are in contact with the intra- or extracellular aqueous phase while the non-polar hydrophobic tails face each other forming the hydrophobic interior of the membrane.The three clases of lipids present in lipid bilayer are- phospholipids, glycolipids and sterols.