Why are proteins synthesized in the ER?

The endoplasmic reticulum (ER) is the port of entry of the protein secretory pathway. Proteins destined for the cell wall, the vacuole or for the other compartments of the endomembrane system are first inserted into the ER and then transported to the Golgi complex en route to their final destinations.

How are proteins synthesized in the endoplasmic reticulum transported inside the cell what are the final target sites of this type of proteins?

Proteins and lipids are carried from the ER to the Golgi in transport vesicles that bud from the membrane of the ER and then fuse to form the vesicles and tubules of the ER-Golgi intermediate compartment (ERGIC). In each case, specific localization signals target proteins to their correct intracellular destinations.

How can protein be synthesized in the cytoplasm?

This process is called protein synthesis, and it actually consists of two processes — transcription and translation. The molecule of mRNA then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. During translation, the genetic code in mRNA is read and used to make a protein.

What happens to the proteins that are synthesized on free ribosomes in the cytoplasm?

What happens to the proteins that are synthesized on free ribosomes in the cytoplasm? The proteins do not go through the Golgi apparatus and move into the nucleus for processing.

How is protein synthesized and transported by the endoplasmic reticulum?

Therefore, the membrane lipids and proteins that are synthesized in the ER must be transported through the network to their final destination in membrane-bound vesicles. When signaled by the cell, these vesicles fuse with the plasma membrane and release their contents into the extracellular space.

How are proteins synthesized in the endoplasmic reticulum?

The outer nuclear membrane is an extension of the membrane of the endoplasmic reticulum, which synthesizes the lipids for all cell membranes. Proteins are synthesized by ribosomes that are either attached to the endoplasmic reticulum or suspended freely in the cell contents.

How is a protein synthesized?

Protein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation. Transcription is the transfer of genetic instructions in DNA to mRNA in the nucleus. It includes three steps: initiation, elongation, and termination.

How do proteins that are synthesized in the free ribosomes find their target destination?

Destinations of Proteins Synthesized By Free Ribosomes They are targeted to the nucleus by their nuclear localization sequence, a sequence of 7–41 amino acids of which the basic amino acids lysine and arginine are characteristic members.

What happens to the proteins that are synthesized on free ribosomes in the cytoplasm do they go through the Golgi apparatus quizlet?

What happens to the proteins that are synthesized on free ribosomes in the cytoplasm? Do they go through the Golgi apparatus? The proteins do not go through the Golgi apparatus and remain free in the cytosol. You are looking at a sample under a light microscope and observe a new type of cell.