Here's a breakdown:

* Ribosomes are the cellular machinery responsible for translating the genetic code from mRNA into a chain of amino acids, which ultimately forms a protein.

* mRNA (messenger RNA) carries the genetic instructions from DNA in the nucleus to the ribosomes.

* The ribosomes then "read" the mRNA code and use it to assemble amino acids in the correct order, building the protein.

While ribosomes are the primary site of protein synthesis, they often work in conjunction with other cellular structures like the:

* Endoplasmic reticulum (ER): Ribosomes bound to the ER synthesize proteins that will be secreted from the cell or incorporated into cellular membranes.

* Golgi apparatus: Proteins synthesized in the ER are often further modified and sorted in the Golgi apparatus before being transported to their final destination.

So, while protein synthesis begins at the ribosomes, it is a complex process that involves the coordinated activity of multiple cellular components.