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The Bacterial Ribosome. The bacterial ribosome is a cytoplasmic nucleoprotein particle whose main function is to serve as the site of mRNA translation and protein synthesis. The ribosome has a mass of about 2.5 MDa, with RNA accounting for 2/3 of the mass.It consists of two subunits denoted 30S (small subunit) and 50S (large).uring protein synthesis a ribosome moves along an mRNA molecule, reading the codon and adding the correct amino acid (from the corresponding aminoacyl tRNA) to the growing protein. When a stop codon is reached,translation ceases, and the mRNA and protein are released.
Ribosomes are like tiny factories in the cell. They make proteins that perform all sorts of functions for the cell's operation. Where are ribosomes located inside the cell? Ribosomes are either located in the liquid inside the cell called the cytoplasm or attached to the membrane. They can be found in both prokaryote (bacteria) and eukaryote (animals and plants) cells. Organelle. Ribosomes are a type of organelle. Organelles are structures that perform specific functions for the cell. The ribosome's job is to make proteins. Other organelles include the nucleus and the mitochondria. Ribosome Structure. The ribosome has two main components called the large subunit and the small subunit.