Explanation: Many cells of a plant are occupied by 90% of the vacuole. Most of the cell’s sugars, proteins and other biomolecules are stored temporarily in the vacuole.

Explanation: Vacuoles store many toxic compounds of the cell including by-products of metabolic pathways. Unlike animal cells, plant cells isolate the toxic by-products (by storing them in the vacuole) from the rest of the cell rather than discharging them.

Explanation: Digitalis is a toxic by-product stored in the plant cell vacuole, used to treat congestive heart failure and heart rhythm problems.

Explanation: Tonoplast is the membrane that bounds the vacuole. It contains many active transport system that pumps ions into the vacuole.

Explanation: Due to high concentration of ions in the vacuole, water enters by osmosis. Hydrostatic pressure exerted by the vacuole provides mechanical strength to the plant cell.

Explanation: Similar to lysosomes present in the animal cells, plant cells contain vacuoles for intracellular digestion. Plant vacuoles have many of the same acid hydrolases as present in the lysosomes.