Biology for IGCSE & O level - Movement Into And Out Of Cells (Section 5 - No. 15)
What is the primary function of active transport?
To move molecules down a concentration gradient.
To move molecules across the cell membrane without any assistance.
To move molecules against a concentration gradient.
To balance the pressure of water inside the cell.
Explanation
Active transport moves molecules against the concentration gradient, requiring energy and transport proteins.
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