Question

what is the difference between plasma membrane and cell wall on the basis of its composition and permeability

Answer 1

Answer:

Explanation:

Difference Between Plasma Membrane and Cell Wall

content pm vs cw

• Plasma Membrane is the phospholipid layer, found in all types of cells; it helps in protecting the protoplasm and checks the passage of molecules inside the cell, Though cell wall is found in the plant cell, fungi, bacteria only and protects the cell from external shocks, and provide rigidity and shape to the cell. The cell wall is the outermost boundary of the cell (if present), and plasma membrane is present in the inner lining of the cell.
• The plasma membrane is delicate thin layer while cell wall is the thick and rigid layer. Plasma Membrane is selectively permeable membrane allowing small molecules entry only; their layer is made up of lipids and proteins and few carbohydrates, while Cell wall constituents may vary from chitin, peptidoglycan, and cellulose.
• Complexity in the cell becomes higher from the lower level of uni-cellularity to the higher level of multicellularity, but they share many things common. In this content, we will discuss the difference between the plasma membrane and cell wall and few of their similarities also.

Following are the key differences between Plasma Membrane and Cell Wall:

• Plasma Membrane is also known as Plasma Lemma, or Cell Membrane is the phospholipid layer present in all types of cells, it is very fragile of only 5-10nm thickness, while Cell Wall is found in the plant cell, bacterial and fungal cell and is made up of cellulose, peptidoglycan, and chitin respectively. It has thickness 4- 20um and is rigid.
• Plasma Membrane is metabolically active and living, while Cell wall is metabolically inactive and non-living; Plasma Membrane requires nutrition to grow while Cell wall doesn’t require nutrition to grow.
• Plasma Membranes are semipermeable and have receptors which help in cell-cell communication, whereas Cell wall is completely permeable and does not have any receptors.
• Plasma Membrane protects protoplasm and checks the entry of molecules. Hence it is a semi-permeable membrane, also helps in cell-cell communication; while Cell wall provides rigidity and protection from external shock to the cell.

Similarities

• Give shape to the cell.
• Provide support and rigidity for the cell.
• Regulate incoming and outgoing of the molecules.
• Provide protection.

Answer 2

Answer:

i can tell for permiability cell wall is semi permiable and plasma membrane is completely permiable