Question

What are vacuole?

Answer 1

Vacuoles are storage sacs for solid or liquid contents. Vacuoles are small sized in animal cells while in plant cells they are very large. The central vacuole of some plant cells may occupy 50-90% of the cell volume. In plant cells vacuoles are full of cell sap and provide turgidity and rigidity to the cell.
Many substances of importance in the life of the plant cell are stored in vacuoles. These include amino acids, sugars, various organic acids and some proteins.