Row 3, which involves movement of molecule X from low concentration to high concentration, describes active transport.
ACTIVE TRANSPORT:
- Active transport is a kind of cellular transport in which molecules are moved from a region of low concentration to a region of high concentration with the usage of energy in form of ATP.
- SInce the movement of molecules in active transport occurs against a concentration gradient i.e. from low to high concentration, energy is required for it to occur.
- Therefore, the row that describes the active transport of molecule X is row 3 because it involves the movement of molecule X from low concentration to high concentration with energy usage.
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