Ribosome in the form of small organelles between 17-20 μm in diameter composed of ribosomal RNA and proteins. Ribosome’s were present in all living cells. These organelles translating the mRNA to form a polypeptide chain (proteins) using amino acids carried by tRNAs on translational process.

The ribosome is the cell where to create or synthesize proteins. Cells that have a high rate of protein synthesis in particular has a number of ribosome that very much. For example, human liver cells have several million ribosome. Not surprisingly, cells that are active in synthesizing proteins also have a clearly visible nucleus.

Ribosomes are found free in the cytoplasm or attached to the endoplasmic reticulum, called RE rude. Each ribosome consists of two sub-units of different sizes. Two sub-units are interconnected in a bond that is stabilized by ion magnesium.

At the time of synthesis of ribosomal proteins clumped into polyribosome (polisom). Most of the proteins made by free ribosome will function in the cytosol. Being bound ribosome generally make proteins are inserted into the membrane, to wrap in certain organelles such as lysosomes or sent outside the cell. Cells can adjust the relative amounts of each type of ribosome was changed metabolism.

Source from: Wikipedia

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