What is passive & active transport?
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Active transport is the movement of molecules or ions against a concentration gradient (from an area of lower to higher concentration), which does not ordinarily occur, so enzymes and energy are required. Passive transport is the movement of molecules or ions from an area of higher to lower concentration.
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In passive transport energy(ATP) is not used and the particles move from high to low concentration.For example- osmosis,diffusion .
In active transport energy as ATP is used to move the solute molecules from low to high concentration.
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