How do cells make proteins?
Proteins are large, complex molecules, which all your cells are making continuously. Each protein is made up of many amino acids which must join together in the correct order for the protein to work properly. Imagine a car assembly line: to end up with a working car, the workers must know when and where to add each part. Likewise, the cell needs a set of commands for making proteins. This instruction manual is in your genes - found in the cell nucleus.