The basic unit of the cell membrane is Phospholipid.
Option (d);
EXPLANATION:
- The cells are smaller in size forms the basic unit or part in living organisms.
- Each cell has a cell membrane that covers the cell and keeps all the contents inside.
- The structure of this cell membrane is mainly classified into two layers of lipids or fats altogether called Phospholipids.
- Cell membrane is also called Plasma membrane.
- Phospholipids have a hydrophilic head, that can dissolve in water and a hydrophobic tail, that cannot be dissolved in water.