in Cell as a Unit of Life by

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Polysome or Polyribosome:


  • Several ribosomes (string of ribosomes), collectively called a polysome or polyribosome (cluster of ribosomes, bound to a mRNA molecule)
  • Ribosomes are the site of protein synthesis (simultaneously synthesizing same protein).
  • Moving along an mRNA molecule at one time, several ribosomes may attach to a single mRNA and form a chain called polyribosome or polysome.
  • Function independently of one another
  • The ribosomes of a polysome translate the mRNA into proteins.
  • For the first time, in 1963 it was discovered and characterized by Jonathan Warner, Paul Knopf, and Alex Rich.
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