Ribosomes

I am the small but important ribosomes. I am generally made up of RNA and protein that are attached to the Endoplasmic Reticulum, or just floating around in the cell, by myself. I have an enzyme that is absolutely necessary to forming peptide bonds. I also function as a manufacturing plant that assembles proteins. Each of my Eukaryotic brothers are a knot of three ribosoma RNA strands in association with about 75 different proteins.