Yes, that's correct! Ribosomes are large molecular aggregates of protein and RNA.

Here's a breakdown:

* Protein: Ribosomes contain a significant amount of protein, which provides structural support and helps in the catalytic functions of the ribosome.

* RNA: Ribosomes also contain ribosomal RNA (rRNA), which plays a crucial role in decoding the genetic information from messenger RNA (mRNA) and guiding the synthesis of proteins.

Together, these proteins and rRNA molecules assemble into two subunits, the large subunit and the small subunit. These subunits work together to translate the genetic code from mRNA into a chain of amino acids, ultimately forming a protein.