cytoplasm
Cell wall keeps the form of a plant cell
The cell membrane, also known as the plasma membrane, contains cell materials and is responsible for controlling the passage of substances in and out of the cell. The cytoplasm, a jelly-like substance within the cell, contains various organelles where different cellular activities take place. And lastly, the nucleus, which is surrounded by a nuclear envelope, houses the cell's genetic material in the form of DNA.
The cell membrane is composed of phospholipids. They form a bilayer for the cell.
Phospholipids are found in the cell membrane which form the bilayer
cell membrane
The form you are describing is a type of membrane-bound organelle known as a vesicle. Vesicles can break off from the cell membrane to transport substances within the cell or to the cell's exterior.
The outer boundary of a general animal cell is the cell membrane.
The singular possessive form is: the cell membrane's purpose.
cell membrane
They make up the plasma membrane and provide flexibility and protection to the plasma membrane. They also form a semi-permeable membrane, therefore making it easy for water to go in an out (osmosis).
Phospholipids are the most abundant molecules in the cell membrane. They have a hydrophilic head and hydrophobic tails that arrange themselves in a lipid bilayer to form the basic structure of the membrane.
All eukaryotic cells have membrane-covered compartments called vesicles that form when part of the cell membrane envelops an object or substance and then pinches off to transport molecules within the cell or to the cell membrane.