What is the role of ribosomes of a polysome?

The correct answer is The ribosomes of a polysome translate the mRNA into proteins.

Key Points

• Ribosomes of a Polysome 
  • The cellular organelles known as ribosomes are made up of proteins and rRNA.
  • Before they bind to mRNA, they are present free in the cytoplasm.
  • Multiple ribosomes that are joined to the mRNA and contain developing polypeptide chains are known as polysomes.
  • A polysome is made up of all the ribosomes that translate a single mRNA into many polypeptides (Proteins) at once.
  • The coding portion of mRNA, which is transported by multiple ribosomes, forms a polysome.
  • The presence of so much mRNA in cells is due to the ability of multiple ribosomes to participate in an mRNA's function.

Additional Information

• Prokaryotic, eukaryotic, and membrane-bound polrsomes all have different structures of multiple ribosomes also known as polyribosomes.
• Bacterial polysomes are found in double-row formations in prokaryotic cells, and ribosomes are in touch with one another within smaller subunits.
• Planar double row polysomes and densely packed 3D helices, which are similar to that of prokaryotic polysomes, are also present in eukaryotic cells.
• Polysomal profiling is a method for determining the level of gene expression by monitoring polysome activity. 
• Translation is stopped using polysomal profiling, and sucrose gradient is then used to separate the resultant cells so that they may be collected by centrifugation.