Question
Download Solution PDFWhat is the role of ribosomes of a polysome?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe 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.
Last updated on Jul 22, 2025
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