Question:
Compare and contrast a cell membrane and cell wall.
Answer:
A cell membrane, seen in plant and animal cells, is selectively permeable and made of a phospholipid bilayer.
Explanation:
An animal cell is surrounded by a cell membrane. A plant cell is surrounded by both a cell membrane and a cell wall.
The cell membrane is made of a phospholipid bilayer. selectively permeable - allowing the entrance and exit of some molecules but not others. The cell wall is freely permeable.
The cell wall protects the plant cell and gives it shape and structure. It is made of cellulose.