The Golgi apparatus remains in close association with the endoplasmic reticulum becauseIt is formed by vesicular structure formed by packaging in nucleus.Materials to be packaged in the form of vesicles from the ER, fuses with cis face of the Golgi apparatus and move towards maturing face.The Golgi apparatus principally perform the functions of packaging materialRough endoplasmic reticulum is frequently observed in the cells actively involved in protein synthesis and secretion

The Golgi apparatus and the endoplasmic reticulum (ER) are closely associated due to their roles in protein synthesis and transport. Here's a step-by-step explanation:

1. The process begins in the nucleus, where the genetic material is used to create messenger RNA (mRNA). This mRNA is a 'blueprint' for creating proteins.

2. The mRNA leaves the nucleus and travels to the rough endoplasmic reticulum (RER). The RER is studded with ribosomes, which read the mRNA and assemble amino acids into a polypeptide chain, creating a protein.

3. Once the protein is synthesized, it is packaged into a vesicle, a small, membrane-bound structure. This vesicle is formed by the RER.

4. The vesicle then travels to the Golgi apparatus. It fuses with the cis face (the receiving side) of the Golgi apparatus.

5. Inside the Golgi apparatus, the protein may undergo further modifications. The Golgi apparatus packages the protein into a new vesicle.

6. This vesicle moves towards the maturing face (the shipping side) of the Golgi apparatus. From there, it can be transported to where the protein