The organelle that puts together proteins for the cell is called the ribosome.

Here's why:

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

* They can be found free-floating in the cytoplasm or attached to the endoplasmic reticulum (ER), which is another organelle involved in protein production and processing.

Let me know if you have any other questions!