Where are proteins synthesised inside the cell?


-Aqsa, Subject Matter Expert at Edumarz.


Solution: Proteins get synthesized in the Endoplasmic Reticulum. The ER is the largest organelle present in the cell. It is a major site of protein synthesis and transport, protein folding, lipid and steroid synthesis, carbohydrate metabolism, and calcium storage. It is also a part of the endomembranous system. 

When the RNA moves out of the cytoplasm, it comes in contact with ribosomes. The ribosomes then convert the RNA into protein and transfer it into the Endoplasmic reticulum. The proteins inside the endoplasmic reticulum undergo some modifications such as the addition of some carbohydrate groups. These lipids and proteins are then directed to be transported to the Golgi apparatus. Inside the Golgi, the protein and lipids undergo other modifications. Modifications inside the Golgi are necessary to provide the functionality to these lipids and proteins. After successful synthesis and modification of proteins and lipids, these are then directed towards their target that is the plasma membrane. The proteins and lipids move out of the plasma membrane packed in vesicles. These vesicles upon reaching the plasma membrane fuse with it.

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