Question

Question 8 Which statement best describes the plasma membrane of a living plant cell? The plasma membrane of a plant cell is a designed to allow for the free flow of all protein substances to move into and out of the cell. b designed to allow certain substances to enter and certain substances to exit the cell. c composed of two layers of proteins with floating molecules of lipids only. d composed of two layers of proteins and carbohydrates only.

Answer 1

The statement that best describes the plasma membrane of a living plant cell is:

**b) designed to allow certain substances to enter and certain substances to exit the cell.**

The plasma membrane is selectively permeable, meaning it regulates the movement of substances, allowing some to pass while restricting others. It is primarily composed of a phospholipid bilayer with embedded proteins, not merely proteins or carbohydrates alone.