Answer:
A Plant cell contains a large vacuole which is membrane-bound organelle specialized to perform several unique functions in the plant cells like:
1. It is used by the plant to store the waste material of the cell.
2. Its major function is to store the water which provides shape and rigidity to the plant cell.
3. It maintains the rigidity as it helps maintain the turgor pressure of the plant cell.
4. It also stores the ions of the cell and thus controls the pH of the cell.
Thus, a plant vacuole serves many functions to the plant cell.