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Active and Passive Transport in Plant Cells

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The selective permeability of a plant cell's plasma membrane controls the movement of solutes between the cell and the extracellular solution. The movement of solutes across the cell's membrane can occur by active transport or passive transport. Active transport requires energy while passive transport does not require energy to move solutes.

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This solution discusses active and passive transport in plant cells. The explanation is given in 371 words with one reference.

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Transport in Plants: Active and Passive

Active Transport

Active transport is the pumping of solutes across membranes against the gradient. It is called active because the cell must give out metabolic energy in the form of ATP to transport a solute "uphill".

Active Transporters

Proton pump: Hydrolyzes ATP and uses the released energy to pump hydrogen ions out of the cell. The result is a higher concentration of hydrogen ions outside the cell than inside the cell. The proton pump therefore moves positive charge outside of the cell, and generates a membrane potential. Proton pumping makes the ...

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