Here's why:
* Ribosomes are the cellular machinery responsible for translating genetic information from mRNA into proteins. They are composed of two subunits:
* The small subunit (40S in eukaryotes, 30S in prokaryotes) binds to mRNA.
* The large subunit (60S in eukaryotes, 50S in prokaryotes) contains the catalytic site for peptide bond formation, where amino acids are linked together to form a protein chain.
* rRNA (ribosomal RNA) is a key component of ribosomes. It provides the structural framework for the ribosome and plays a crucial role in the decoding of mRNA and the formation of peptide bonds.
* Proteins are also essential components of ribosomes. They help with the assembly and function of the ribosomal subunits and contribute to various aspects of translation, such as binding mRNA and tRNA (transfer RNA).
Therefore, the combination of rRNA and proteins forms the ribosome, which is the essential site for protein synthesis within a cell.
