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Ribosomes consist of two major subunitsâthe small ribosomal subunit reads the mRNA, while the large subunit joins amino acids to form a polypeptide chain. Each subunit is composed of one or more ribosomal RNA (rRNA) molecules and a variety of proteins.Eukaryotes have 80S ribosomes, each consisting of a small (40S) and large (60S) subunit. Their small subunit has a 16S RNA sub-unit (consisting of 1540 nucleotides) bound to 21 proteins.ach subunit is composed of one or more ribosomal RNA (rRNA) molecules and a variety of proteins. Eukaryotes have 80S ribosomes, each consisting of a small (40S) and large (60S) subunit. Their small subunit has a 16S RNA sub-unit (consisting of 1540 nucleotides) bound to 21 proteins.
The ribosome (/ËraÉªbÉµËzoÊm/) is a large and complex molecular machine, found within all living cells, that serves as the site of biological protein synthesis (translation). Ribosomes link amino acids together in the order specified by messenger RNA (mRNA) molecules.ibosomes consist of two major components: the small ribosomal subunit, which reads the RNA, and the large subunit, which joins amino acids to form a polypeptide chain. Each subunit is composed of one or more ribosomal RNA (rRNA) molecules and a variety of proteins.