Question

Selectively permeable membranes are those that allow penetration of ________?

• A. only solvent molecules but not solute molecules
• B. only solute molecules but not solvent molecules
• C. neither solvent nor solute molecules
• D. both solvent and solute molecules

Answer 1

Answer:

A. only solvent molecules but not solute molecules

• Selectively permeable membranes allow the passage of certain molecules but not others.

• This means they allow both solvent and solute molecules, but at different rates depending on the size and properties of the molecule.

• Active transport processes require the cell to expend energy to move the materials, while passive transport can be done without using cellular energy.