Question

Why do plant cells have an additional layer surrounding the cell membrane? What is this layer known as?

Answer 1

Plant cell:

1. Plant cells are eukaryotic cells. They contain a wide variety of organelles, each of which plays a particular function within the cell.
2. The presence of a cell wall is a distinctive feature of a plant cell.
3. It's a non-living hard structure that serves as a protective layer for the plants' plasma membrane.
4. The cell wall is primarily composed of cellulose.

Functions of cell wall:

1. It gives shape to the cell.
2. It defends the cell against mechanical harm and infection.
3. It aids cell-to-cell communication and acts as a barrier to unwanted macromolecules.