Ribosome-1

•The ribosome is a cell organelle made of ribosomal RNA molecules and proteins that form a factory for protein synthesis in cells.
•In 1955, George E. Palade discovered ribosomes and described them as small particles in the cytoplasm that preferentially associated with the endoplasmic reticulum membrane.
•Ribosomes occur both as free particles in prokaryotic and eukaryotic cells and as particles attached to the membranes of the endoplasmic reticulum in eukaryotic cells.