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midknight9
Not entirely sure of the answer you are looking for, but when a molecule is moved against a concentration gradient, there is energy involved.

For example, the proton pump in the body (H+ ATPase) requires an input of energy in the form of ATP in order to provide the H+ concentration gradient that is needed.
topcatisplant

Sample answer: The molecule is being moved from an area of lower concentration to an area of higher concentration.

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