Question

Which one of the following is rigid, non-living freely permeable and mainly composed of cellulose?
1. Tonoplast
2. Nuclear membrane
3. Cell wall
4. Plasma membrane

Answer 1

Correct Answer - Option 3 : Cell wall

The correct answer is the Cell wall.

• A cell wall can be defined as a rigid layer that encircles the contents of the cell.
• This is a semi-permeable layer that acts as a protective layer in certain types of cells.
• As such, the cell wall will be seen outside of the cell membrane in the cells of the following organisms: The animal and protozoan cells do not contain a cell wall.

• Characteristics-
  • Non-living rigid layer surrounding the plasma membrane.
  • Mainly composed of cellulose.
• Function-
  • Gives rigidity and shape to the plant cell.
  • Allows substances in solution to enter and leave the cell without hindrance.
  • Provides protection.