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RIBOSOMES
-----Granules containing protein and rRNA
-----Site of protein synthesis
-----Free ribosomes synthesize soluble proteins that function in the cytosol
-----Membrane-bound ribosomes synthesize proteins to be incorporated into membranes or export from the cell
-----Free- and Membrane-bound ribosomes can attach and detach according to need
ENDOPLASMIC RETICULUM
-----Membranous network surrounding the nucleus
----- Continuous with the nuclear membrane
-----Accounts for 1⁄2 of the cells membranes!
-----Two varieties – rough ER and smooth ER
GOLGI APPARATUS
-----Directs the trafficking of synthesized proteins
-----Functions in modification, concentration, and
packaging of proteins made in the rough ER
-----Transport vessels from the ER fuse with the cis face of the Golgi apparatus
Modifications involve the addition or removal of sugars and phosphates
-----Proteins then pass through the Golgi apparatus to the trans face
-----Secretory vesicles leave the trans face of the Golgi stack and move to designated parts of the cell
27. Discuss the structure and function of...including functional interrelationships among these organelles.
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