Biology for IGCSE & O level - Movement Into And Out Of Cells (Section 4 - No. 4)
What is the main purpose of active transport in cells?
To move water molecules across the membrane.
To maintain the correct concentration of ions and molecules inside the cell.
To facilitate the movement of large molecules across the membrane.
To remove waste products from the cell.
Explanation
Active transport is used to maintain cellular homeostasis by moving essential molecules and ions across the membrane against their concentration gradients.
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