| I: | are small in size, if present |
| II: | are bound by a double membrane |
In general, the functions of the vacuole include all except:
| 1. | isolating materials that might be harmful or a threat to the cell. |
| 2. | storing waste products. |
| 3. | maintaining internal hydrostatic pressure or turgor within the cell. |
| 4. | maintaining an alkaline internal pH. |
| 1. | contains water, sap, excretory product and other materials not useful for the cell. |
| 2. | store enzymes capable of digesting carbohydrates, proteins, lipids and nucleic acids. |
| 3. | are formed by engulfing the food particles. |
| 4. | are important for osmoregulation and excretion. |