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means that the molecule is moving from a area where it is low in concentration to an area where it is high in concentration with the expenditure of energy.
Substances move freely down its gradient that is from high to low (along its concentration gradient) but if it has to move the opposite direction energy is needed because its moving from low to high..
Substances move freely down its gradient that is from high to low (along its concentration gradient) but if it has to move the opposite direction energy is needed because its moving from low to high..
When a molecule is moved against a concentration gradient, it means that the molecule is moved from a region of low to high concentration.
What is concentration gradient?
Concentration gradient refers to the difference in concentration of two regions.
A molecule can either move down a concentration gradient or against a concentration gradient.
A molecule moves down a concentration gradient when it is moved from high to low concentration while it is against a concentration gradient when it is from low to high.
Learn more about concentration gradient at: https://brainly.com/question/13050811
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