What type of RNA is a major component of the structure bat which protein synthesis occurs?

Ribosomes consist of two major components: the small ribosomal subunits, which read the RNA, and the large subunits, which join amino acids to form a polypeptide chain. Each subunit comprises one or more ribosomal RNA (rRNA) molecules and a variety of ribosomal proteins (r-protein or rProtein).

it is ribosomal RNA since it is a main component of the ribosomes structure