In which cellular location would you expect to find ribosomes translating mRNAs that encode ribosomal proteins?

Question

Quizplus · Accepted Answer

Ribosomes are responsible for translating mRNA into proteins, and ribosomal proteins are part of the structure of ribosomes. Ribosomes are found in the cytosol, where most protein synthesis occurs. They can also be found on the rough endoplasmic reticulum (ER) when the proteins they are synthesizing are destined for a membrane or secretion outside the cell. However, in this case, the ribosomal proteins are being translated by existing ribosomes, which are found in the cytosol. The nucleus contains the DNA but not the ribosomes necessary for translation. The lumen of the ER is where proteins are folded and modified but not where translation occurs.

In Which Cellular Location Would You Expect to Find Ribosomes