Question

describe the structure and types of cell membrane ?​

Answer 1

$answer$

The cell membrane, also known as the plasma membrane, is a double layer of lipids and proteins that surrounds a cell and separates the cytoplasm (the contents of the cell) from its surrounding environment. It is selectively permeable, which means that it only lets certain molecules enter and exit.

Answer 2

$\Huge\green{\textbf{Answer:}}$

$\blue{\textbf{Types of Membrane:}}$

$\orange{\textbf{Impermeable Membrane:}}$

→ This membrane does not allow the passage of substances through them.

→ Example:

• Cutinised cell walls

$\orange{\textbf{Permeable Membrane:}}$

→ This membrane allow the passage of substances through them.

→ Example:

• Cellulosic cell walls

$\orange{\textbf{Semipermeable Membrane:}}$

→ This membrane allow the movement of solvent molecules through them but does not allow the passage of solute particles.

→ Example:

• Egg membrane

• Parchment membrane

$\orange{\textbf{Selectively permeable Membrane:}}$

→ This membrane normally Semipermeable but allow selective passage of solutes through them.

→ Example:

• Plasma membrane

• Tonoplast