Biology – Cells as the basic units of living organisms | e-Consult

The Golgi body is a complex organelle consisting of flattened, membrane-bound sacs called cisternae. These cisternae are arranged in stacks, and the Golgi has distinct regions: the *cis* face (receiving side), the *medial* region, and the *trans* face (shipping side).

Structure and Function: Proteins and lipids arrive at the *cis* face of the Golgi in transport vesicles. As they move through the Golgi cisternae, they undergo further processing, modification, and sorting. This includes glycosylation (addition of sugar molecules), phosphorylation, and other modifications. The Golgi then packages these modified proteins and lipids into new transport vesicles that bud off from the *trans* face. These vesicles then transport the molecules to their final destinations within the cell or outside the cell (secretion).

Role in Protein Processing and Transport: The Golgi acts as a processing and packaging center for proteins synthesized in the RER. It ensures that proteins are properly modified and sorted before being delivered to their correct locations. The Golgi also synthesizes certain polysaccharides, such as those found in plant cell walls. The Golgi's role in protein transport is crucial for maintaining cellular function and ensuring that proteins are delivered to the right place at the right time.