The cell organelles that are responsible for protein synthesis are known as Ribosomes.
Discovery: In 1955, Pavel first discovered Ribosome.
Shape: Almost round or oval shaped.
Number: It varies from cell to cell.
Position: They may remain attached to the endoplasmic reticulum, are around the outer surface of the nuclear membrane and also the) may be found freely in the cytoplasm
Structure: Each ribosome consists of about 40%. RNA and 60% protein It is surrounded by a two-layered membrane.
(i) It synthesizes protein.
(ii) It helps in sending the synthesized substances to Golgi bodies.