Definition of Polyribosome



A group of ribosomes that are bound to a molecule of messenger RNA in the form of beads in a string is termed as a polyribosome. The other names given to this structure are polysomes and ergasomes. A polyribosome is a complex that is formed by the combination of two or more than two units of ribosomes along with a molecule of mRNA.

 


This complex is responsible for translating the inPolyribosomeformation stored in the mRNA into the form of polypeptides. These are formed in the cell when the process of translation is going on. Furthermore, the structures of the prokaryotic and eukaryotic polyribosomes are quite distinct from each other. The level of gene expression can be measured by the activity of the polyribosomes.

 

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