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Ribosomes start protein synthesis in the cytoplasm. Synthesis is completed either in the cytoplasm or in the lumen of the rough endoplasmic reticulum.
All proteins begin as polypeptides (chains of amino acids). The synthesis of a chain starts when a free (unattached) ribosome begins to move along a molecule of messenger RNA (mRNA) in the cytoplasm.
Once a small number of amino acids have been incorporated into the chain, large molecules in the cell "inspect" the chain. Certain sequences of amino acids are recognized as marking the chain for synthesis in the lumen of the rough endoplasmic reticulum (ER).
If the chain has one of these sequences, the mRNA and ribosome are moved to the ER and the ribosome is fixed in the ER membrane in such a way that the mRNA remains in the cytoplasm but the polypeptide chain is in the lumen of the ER. It is in the lumen that the chain is completed, and subsequently coils and folds to form the finished polypeptide.
If, on the other hand, the chain does not have one of these marker sequences, synthesis of the chain and its subsequent coiling and folding all take place in the cytoplasm.
What else can I help you with?
What is a easy way to remember ribosomes?
Think of ribosomes as the cell's protein factories since they are responsible for protein synthesis. You can envision them as little "ribosome factories" constantly working to produce proteins for the cell.
What is a small particle in a cell on which proteins are assembled made of RNA and protein?
Endoplasmic Reticulum
What is another word for ribosome?
Another word for ribosome is "protein factory" as ribosomes are responsible for synthesizing proteins in cells.
What does the ribosome do in a amimal cell?
Other answer: Ribosomes produce and assemble proteins throughout the cell. Therefore, building/ repairing parts of the cell <3 My Answer <3Small organelles composed of RNA-rich cytoplasmic granules that are sites of protein synthesis
What organelle is responsible for production of protein?
The ribosome.
What is a easy way to remember ribosomes?
Think of ribosomes as the cell's protein factories since they are responsible for protein synthesis. You can envision them as little "ribosome factories" constantly working to produce proteins for the cell.
What is structure in a cell makes protein?
ribosome
What organelle in the protein factory in a cell?
Ribosome
What do ribosome. do for the cell.?
Ribosomes do the work of protein synthesis for the cell.
What is the site of protein synthesis in the cell composed of rRNA and protein?
Ribosome.
What part of the cell creates protein for the cell?
They are maaaade on ribosomes. DNA codes for proteins
Where in the cell is protein made?
Protein is made in the ribosome.
What do ribosomes do inside the cell?
ribosome help make protein for the cell
What is the part of a cell creates protein called?
Ribosome
What are ribosome produce in a eukaryotic cell?
The ribosomes produce proteins.
Describe how cells produce and release protiens?
Protein The cell produces proteins by a process called translation. mRNA is translated at the ribosome into proteins.
Functions as factories to produce proteins in a cell?
Ribosomes are the structures that function as factories to produce protein. They connect one amino acid at a time and build long chains.
