Here's why:
* Ribosomes are small organelles found in both prokaryotic and eukaryotic cells.
* They act as the "protein factories" of the cell, reading the genetic code carried by messenger RNA (mRNA) and using that information to link amino acids together in a specific order, creating a polypeptide chain.
* This polypeptide chain then folds into a functional protein.
While other parts of the cell play important roles in protein synthesis (like the nucleus where DNA is transcribed into mRNA, or the endoplasmic reticulum where proteins are folded and modified), the ribosomes are the key players in actually building the protein molecules.