Question

Describe the structures and function of cell
membrane and cell wall.​

Answer 1

Answer:

The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells

☺ITZ CANDY FLOSS ☺

Answer 2

Cell Wall

the cell wall is present only in plants, fungi and bacteria. the cell wall is the outermost covering of plant cells and is present outside the cell membrane and its tough for flexible and sometimes rigid in its texture and is mainly composed of cellulose long fibres of Carbohydrates including in lignin, pectin, and hemicellulose.

Main functions of the cell wall are:

• protecting the cell against physical damage and invading pathogens.
• regulate and control the direction of cell growth.
• providing the strength structural support and maintaining the shape of the cell.
• functions as a storage unit bi storing carbohydrates for use in plant growth especially in seeds.
• it allows entry of smaller molecules through it freely.

Cell Membrane

the cell membrane is also known as plasma membrane. it is the outermost covering of animal cells. it is a semipermeable membrane composed of lipids and proteins.

Main function of the cell membranes are:

• protection the integrity of the interior cell.
• providing support and maintaining the shape of the cell.
• cell membrane also plays an important role in cell signalling and communication.
• It act as a selectively permeable membrane by allowing the entry of only selected substances into the cell.
• it helps in regulating cell growth through the balance of exocytosis and endocytosis.