Microbial Metabolism
The mechanism of passive or facilitated diffusion require

accumulation of solute against an electrochemical gradient
accumulation or concentration of solute against an electrochemical gradient
concentration of solute against an electrochemical gradient
metabolic energy

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Microbial Metabolism
Dolichol phosphate is

a complex lipid involved in docking vesicles with the plasma membrane
a chaperone used in protein folding
the anchor on which sugars assemble before transfer to proteins
a product of phospholipase C activation

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