Here's a breakdown:

* Ribosomes: These are complex molecular machines found in all living cells. They are the sites of protein synthesis, reading the genetic code from messenger RNA (mRNA) and using that information to assemble amino acids into polypeptide chains, which then fold into functional proteins.

* mRNA: This molecule carries the genetic code from DNA in the nucleus to the ribosomes in the cytoplasm.

* tRNA: Transfer RNA molecules bring the specific amino acids to the ribosome, matching them to the codons on the mRNA.

The process of protein synthesis (also called translation) happens in a few key steps:

1. Initiation: The ribosome attaches to the mRNA and finds the start codon.

2. Elongation: The ribosome reads the mRNA codons one by one, and tRNA molecules bring the corresponding amino acids to the ribosome. The amino acids are linked together to form a polypeptide chain.

3. Termination: The ribosome reaches a stop codon, signaling the end of the protein. The polypeptide chain is released from the ribosome.

After being synthesized, the polypeptide chain may undergo further processing, such as folding, modification, and transport to its final destination in the cell.