Question

What is a cell wall?

Answer 1

A protective layer outside a cell. Ex: Cell walll of a plant

Answer 2

Cell wall is non-living and freely permeable and is secreted by the cell itself for the protection of plasma membrane and cytoplasm.

Cell wall determines the shape of a plant cell and prevents desiccation of cells.

Function :-

• It permits the plant cell to become turgid.
• It provides mechanical strength to support the cell.
• It is really permeable to water and substances in solution.
• It has narrow pores, called pits, through which fine strands of cytoplasm, called plasmodesmata are able to pass.
• The cell walls of adjacent sides are glued together by the middle lamella.