Question

The plant cell cytoplasm is surrounded by both cell wall and cell membrane. The specificity of transport of substances are mostly across the cell membrane, because

Answer 1

Plasma membrane:

• Plasma membrane is a lipid bilayer containing integral and peripheral proteins.
• Since it has a hydrophobic lipid bilayer only lipid soluble molecules can easily diffuse through and not hydrophilic solutes.
• The membrane proteins bind and allow only certain hydrophilic solute molecules to pass through the plasma membrane. Thus the plasma membrane is called a selectively permeable membrane.

Final answer: Selective permeability