Here's why:

* Ribosomes are the protein factories of the cell. They read the genetic code carried by messenger RNA (mRNA) and use that information to link amino acids together, forming polypeptide chains. These chains then fold into functional proteins.

* Ribosomes are found in both prokaryotic and eukaryotic cells. They can be free-floating in the cytoplasm or attached to the endoplasmic reticulum (ER).

* Protein synthesis is a complex process that involves multiple steps, including transcription (copying DNA into mRNA), translation (using mRNA to build protein), and protein folding. Ribosomes play a crucial role in translation, the step where proteins are actually built.

Let me know if you'd like to know more about the protein synthesis process!