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ribosomes. consists of 2 subunits-made of rna and protein function-site of protein synthesis a cell organelle that functions as the site of protein synthesis inthe cytoplasm. its rna components are constructed in the nucleolus.onsists of 2 subunits-made of rna and protein function-site of protein synthesis a cell organelle that functions as the site of protein synthesis inthe cytoplasm. its rna components are constructed in the nucleolus.
A cell's protein synthesis takes place in organelles called ribosomes. Ribosomes are complex structures made up of two distinct and separable subunits (one about twice the size of the other). Each subunit is composed of one or two RNA molecules (60-70%) associated with 20 to 40 small proteins (30-40%).