Endomembrane system

• What is the first step after an amino acid is made?


  Proteins are assembled by ribosomes on the rough ER
• What role do vesicles play in the endomembrane system?

  Vesicles transport proteins to the Golgi apparatus
• What happens to proteins in the Golgi apparatus?

  The Golgi apparatus completes the modifications on proteins
• After proteins are modified in the Golgi apparatus, where are they sent?

  They are sent to their desired location
• What are the organelles involved in the endomembrane system?

  • Rough ER (Endoplasmic reticulum)
  • Vesicles
  • Golgi apparatus
  • Lysosome
• How are other proteins transported and secreted?

  They are transported and secreted by using a secretory vesicle
• Why is the rough ER called "rough"?


  It is rough because it has ribosomes
• What's a secretory vesicle?


  A membrane-bound organelle that transports and releases molecules outside the cell.
• What can happen to proteins after they are made?

  1). Sent to cell membrane as channel protein

  2). Used as digestive enzyme in lysosome

  3). Rest are transported and secreted by a secretory vesicle.