| Front | Describe the interrelationship between the organelles involved in the production and secretion of proteins. |
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| Back | Protein synthesis: 1. Proteins are synthesised on the ribosomes bound to the endoplasmic reticulum. 2. Proteins pass into the cisternae of RER and are packaged into transport vesicles. 3. Transport vesicles containing the proteins move towards the Golgi apparatus via the transport function of the cytoskeleton. 4. Vesicles fuse with the cis face of the Golgi and proteins enter it. Proteins are structurally modified while moving through Golgi's cisternae before leaving the Golgi apparatus in secretory vesicles from its trans face. 5. Secretory vesicles with proteins move towards and fuse witht he cell surface membrane releasing their contents out of the cell by exocytosis. (if lysosome enzymes are made, the vesicles turn into lysosomes and exocytosis does not happen) |
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