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Ribosomes, E.R., and Golgi apparatus
Ribosomes:
Structure- small granules composed of protein and RNA. Made from 2 subunits that fit together
Function- free ribosomes make proteins that function in the cytosol, whereas
attached ribosomes make proteins that incorporate into the cell membrane or are to be exported outside of the cell.
Endoplasmic Reticulum:
Structure- system of interconnected tubes and parallel membranes enclosing fluid filled cavities thats coils through the cytosol
Function- rough: proteins are bound in vesicles for transport to the Golgi body. synthesizes phospholipids and cholesterol.
Smooth: lipid and steroid synthesis, lipid metabolism and drug detoxification.
Golgi apparatus-
structure:stack of smooth membrane sacs and vesicles close to the nucleus
Function: packages, modifies and separates proteins to be secreted from the cell