What is the main difference between active an | vedclass

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(D) Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration (aga

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Active transport requires energy.

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(D) Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration (against the concentration gradient). This process requires the expenditure of metabolic energy in the form of $ATP$.In contrast,passive transport (such as diffusion or facilitated diffusion) occurs along the concentration gradient (from higher to lower concentration) and does not require energy expenditure.

What is the main difference between active and passive transport?

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