Question

An example of selectively permeable membrane is

• A. Plasmalemma
• B. Cell wall
• C. Mitochondrial membrane
• D. Chloroplast membrane

Answer 1

Answer: (A)

Plasmalemma

• Selectively permeable membrane is the membrane, which allows free passage of water and only selected solute molecules are allowed to pass through.
• The plasmalemma is selectively permeable but it is not the only membrane that is selectively permeable, other membranes in living systems are also selectively permeable. In this question for chloroplast and mitochondrial membranes, the outer or inner membrane is not mentioned.
• The outer chloroplast or mitochondrial membrane is different in permeability from inner chloroplast or mitochondrial membrane.

So, the correct answer is option A.