The nucleus has DNA which is changed to RNA by RNA polymerase. The mRNA travels out of the nucleus, to the ribosomes and instructs the ribosome to make a protein. The codons determine which protein it is. The Golgi apparatus sorts and packages the proteins once they are made.
The endomembrane system is important in cellular function because it moves materials around in the cell. The materials move through transport vesicles. The vesicles are able to move through the cytoplasm in order to get to their final destination. Some materials stay in the cell membrane and some exit the cell.
The smooth ER is important to the synthesis of lipids and lacks ribosomes.
The rough ER contains ribosomes. Pancreas secrete protein insulin.
The golgi apparatus ships proteins. If the golgi apparatus ceased to function, the materials would be scattered every where and the cell would not function properly.
The cytoplasmic protein starts at the nucleus and goes through the endoplasmic reticulum. It then goes through the vesicle and then to the golgi. It goes through another vesicle and separates and stays in the cell membrane.
The DNA is transferred into RNA in the endoplasmic reticulum and travels to the vesicle, then goes through the golgi apparatus and goes through the vesicle and leaves the cell.
The glycoprotein is transferred to the endoplasmic reticulum, then goes to the vesicle. After it goes to the vesicle, it goes through the golgi apparatus and is folded into a glycoprotein and then goes into the vesicle, it then travels to the cell membrane and stays there.
This video explains that the lipid starts at the nucleus and travels through the endoplasmic reticulum, where the DNA is changed to RNA by rna polymerase, then travels through the vesicle and then goes to the golgi apparatus, and then stays in the membrane of the cell. Lipids protect the cell membrane which is why the lipid does not exist the cell. (The video states that it exists the cell, but this is NOT correct!!!) [Sorry!]