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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.
This genetic information is found in the nucleus, though protein synthesis actually occurs in ribosomes found in the cytoplasm and on rough endoplasmic reticulum. If protein is to be synthesised, then the genetic information in the nucleus must be transferred to these ribosomes. This is done by mRNA (messenger ribonucleic acid). It is very similar to DNA, but fundamentally differs in two ways. 1  A base called uracil replaces all thymine bases in mRNA.