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Does a cell use energy when molecules diffuse in or out of the cell down the concentration gradient
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Does a cell use energy when molecules diffuse in or out of the cell down the concentration gradient

User Eminsenay
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Depends if it is an active or passive one(transports), If it goes against the concentrarion gradient it uses ATP(energy), on the other way if its not against its called passive transport and does not require ATP.
User Pthurlow
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