What is a vacuole and its function?

1 Answer

Vacuoles are membrane bound cell organelles, filled with water, containing inorganic and organic molecules.


Vacuoles are present in all plant and fungal cells. Animal cell vacuoles are smaller in size. Most bacteria and animal cells have vacuoles.

Functions of vacuoles are :

  • it maintains turgor pressure within the plant cells.
  • it acts as a storage organelle.
  • vacuoles in many cases contain chemicals which would otherwise react with the cytosol.
  • in plants vacuoles help in maintaining the cytoplasmic pH of the cell.
  • in certain fungi ( yeast ) vacuoles are involved in osmoregulation, degradative processes and storing amino acids.
  • in some Cyanobacteria, vacuoles contain gases ( gas vacuoles ) that help in controlling their buoyancy.
  • in animal cells vacuoles are involved in the containment, transport and disposal of some proteins and lipids to the extra cellular environment of the cell.