Which one of the following statements is correct about the cell membrane ?
It is made up of cellulose.
It is a permeable structure for all substances.
It is flexible and enables the cell to engulf many materials.
It does not allow diffusion of gases like oxygen and carbon dioxide.
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CDS-1 – 2022
The cell membrane is primarily composed of a lipid bilayer with embedded proteins (fluid mosaic model). This structure is flexible and allows the cell to change shape and engulf substances from the external environment through processes like endocytosis (e.g., phagocytosis and pinocytosis), which is essential for functions like nutrition or defence.