protein trafficking

• 1. proteins produced on ribosomes of RER
  2. folded and processes in RER
  3. vesicles w protein bud off RER and fuse with sacs of golgi body
  4. modified in Golgi- packages proteins into vesicles to be transported round the cell where needed, some leave via exocytosis
• Explain protein trafficking (4) 

  -       Proteins are folded in the RER

  -       Proteins are packaged into and transported in vesicles

  -       Protein is modified in the golgi apparatus and packaged into vesicles

  -       Leave cell via exocytosis
• Describe the roles of golgi body and vesicles in the formation and transport of extracellular enzymes (4)

  -       Vesicles fuse with the golgi apparatus and proteins enter 

  -       Modification of proteins inside golgi apparatus

  -       Proteins packaged into vesicles

  -       Vesicles fuse with cell surface membrane for proteins/enzymes to release via exocytosis