Ribosome - GCSE Biology Definition

A ribosome is a tiny structure found inside cells that plays a crucial role in making proteins, which are essential for many functions in living organisms. Ribosomes assemble proteins by linking amino acids together in the correct order, using instructions carried by messenger RNA (mRNA) from the DNA in the nucleus. They can be found floating freely in the cytoplasm or attached to the rough endoplasmic reticulum. Ribosomes are vital because proteins are needed for cell structure, controlling chemical reactions, and carrying out various tasks to keep cells healthy and functioning.