Here's why:
* Ribosomes are the protein synthesis factories of the cell. They read the genetic code from messenger RNA (mRNA) and use that information to assemble amino acids into proteins.
* Ribosomes are composed of two subunits:
* The small subunit: This subunit binds to mRNA and helps match it to the correct transfer RNA (tRNA).
* The large subunit: This subunit contains the catalytic site where peptide bonds are formed to link amino acids together.
* Both subunits are made up of ribosomal RNA (rRNA) and proteins. The rRNA provides the structural framework for the ribosome, and the proteins help with the binding of mRNA and tRNA, as well as the catalytic activity.
So, to summarize, ribosomes are the cellular components that are made up of both RNA and protein, and they play a crucial role in protein synthesis.