Biology for IGCSE & O level - Movement Into And Out Of Cells (Section 4 - No. 44)
How are carrier proteins involved in active transport?
They create the concentration gradient.
They bind to the molecules being transported and use ATP to move them across the membrane.
They allow water to pass through.
They facilitate the movement of molecules down the concentration gradient.
Explanation
Carrier proteins actively transport molecules across the cell membrane using ATP as an energy source.
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