Yes, plant cells do have plasma membranes. The plasma membrane is a crucial component of all living cells, including plant cells. It is the outermost boundary that separates the interior of the cell from its external environment.
The plasma membrane is primarily composed of a lipid bilayer along with proteins, carbohydrates, and cholesterol. This structure allows the membrane to be selectively permeable, meaning it controls the movement of substances in and out of the cell. It plays a key role in communication and signaling between cells and their surroundings.
Additionally, plant cells have a rigid cell wall outside the plasma membrane that provides structural support and protection. However, the presence of both the plasma membrane and the cell wall is vital for the proper functioning of plant cells, allowing them to maintain homeostasis while being part of a larger, interconnected organism.