Ribosomes are composed of proteins and RNA.
The functions of ribosomes:
They act as a site for protein synthesis. The mRNA that codes for a protein binds to the ribosomes and translates codons to form amino acids and synthesis proteins.
The ribosomes bound to the endoplasmic reticulum form secretory proteins while free ribosomes form structural proteins.
Final Answer:
Ribosomes play an important role in protein synthesis, decoding mRNA to form proteins with the help of tRNA that brings respective amino acids.