Biology for IGCSE & O level - Movement Into And Out Of Cells (Section 4 - No. 7)
What is a key difference between active transport and passive transport?
Active transport requires energy (ATP) to move substances against their concentration gradient, while passive transport does not.
Active transport moves water molecules, while passive transport moves solute molecules.
Active transport uses channel proteins, while passive transport uses carrier proteins.
Active transport occurs only in animal cells, while passive transport occurs only in plant cells.
Explanation
Active transport utilizes energy (usually ATP) to move molecules across the cell membrane against the concentration gradient. Passive transport does not need energy and uses the concentration gradient.
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