It is known as the 'site of protein synthesis in the cell', and synthesizes proteins. It is chiefly composed of RNA (Ribonucleic acid).

  It helps in the storage of water and several other substances, namely food, waste products and pigments. It also provides turgidity to the cell.

  It synthesizes proteins by producing and storing RNA (Ribonucleic acid). At the same time, it orders ribosomes to synthesize proteins.

  It provides shape to the cell. It is semi-permeable, regulating the entry and exit of substances, namely solutes and ions.