In active transport, a. no energy input is required from the cell. b. the plasma membrane forms a pocket that pinches inward, forming a vesicle that contains material from outside the cell. c. molecules move across the plasma membrane against their concentration gradient. d. molecules move across the plasma membrane by crossing the lipid bilayer directly, rather than by using a transport protein. e. a vesicle inside the cell fuses with the plasma membrane and releases its contents outside the cell.

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16 November, 14:17

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Hillary Finley · Answer 1

d. molecules move across the plasma membrane by crossing the lipid bilayer directly, rather than by using a transport protein.