Question

Plasma membrane exhibits _________- for external substances

• A. Impermeability
• B. Selective permeability
• C. Permeability
• D. None of the above

Answer 1

The correct option is B Selective permeability

Plasma membrane allows water to freely pass through according to the concentration gradient of water molecules. For transport of external substances, it allows only selected solute particles to pass through the plasma membrane, hence, it is called selectively permeable or differentially permeable. It differentiates between various solute particles and allows only selected solute particles to enter or leave the cell.

So, the correct answer is 'Selective permeability'