Here's a breakdown:

* Ribosomes are complex molecular machines found within all living cells.

* They are responsible for reading the genetic code carried by messenger RNA (mRNA) and using it to assemble amino acids into polypeptide chains.

* These polypeptide chains then fold into functional proteins, which carry out a vast array of tasks within the cell and organism.

Think of ribosomes as the cellular factories that build the proteins needed for everything from structural support and enzyme activity to signaling and defense.