What is the definition of polyribosomes?
Definition of polyribosome : a cluster of ribosomes linked together by a molecule of messenger RNA and forming the site of protein synthesis.
How are polyribosomes made?
Polyribosome structures are made of ribosomes connected by a strand of mRNA that runs between the large and small ribosomal subunits.
Which is a benefit of polyribosomes in protein translation?
What are the advantages of polyribosomes? This occurs when multiple ribosomes translate a single mRNA simultaneously- forms polyribosome/ polysome. Polyribosomes allow many polypeptides to be synthesized simultaneously, which makes the process more efficient.
Where are polyribosomes found?
Polyribosomes are found either free in the cytosol or attached to the endoplasmic reticulum. In general,”free” polyribosomes synthesize proteins that remain in the cell, such as hemoglobin in red blood cells or contractile proteins in muscle cells.
What are polyribosomes quizlet?
Polyribosome (Polysome) aggregation of several ribosomes attached to one mRNA molecule.
What is polysome and its function?
Polysome is a cluster of ribosome. It is held by a strand of messenger RNA (mRNA) in rosette or helical group. They take part in translation and play a role in formation of multiple copies of same polypeptide.
What are polyribosomes made of?
Polysomes are macromolecular complexes made up of multiple ribosomes simultaneously translating a single mRNA into polypeptide chains. Together, the cellular mRNAs translated in this way are referred to ‘translatome.
Why are polyribosomes present in spines?
The presence of polyribosomes in dendritic spines suggests a potential involvement of local protein synthesis in the modification of synapses. Local protein synthesis might therefore serve to stabilize stimulation-induced growth of the postsynaptic density.
What are polyribosomes and what happens at these structures?
A polyribosome (or polysome or ergosome) is a group of ribosomes bound to an mRNA molecule like “beads” on a “thread”. It consists of a complex of an mRNA molecule and two or more ribosomes that act to translate mRNA instructions into polypeptides.
What are Polyribosomes and what happens at these structures?
What are Polysomes quizlet?
Polysome. A group of 2 or more ribosomes translating an mRNA sequence simultaneously.
Why are polyribosomes important to both eukaryotic and prokaryotic cells?
In prokaryotic cells, the transcription initiation complex binds to … Why are polyribosomes important to both eukaryotic and prokaryotic cells? They can make many copies of a polypeptide very quickly. Which of the following is important during the translocation of tRNA from the A site to the P site?