Biology for IGCSE & O level - Movement Into And Out Of Cells (Section 3 - No. 7)
Which of the following best describes osmosis?
The movement of solute molecules from a region of high concentration to a region of low concentration.
The movement of water molecules from a region of high solute concentration to a region of low solute concentration.
The movement of water molecules from a region of high water potential to a region of low water potential across a semi-permeable membrane.
The movement of solute molecules across a semi-permeable membrane, driven by a concentration gradient.
Explanation
Osmosis is the movement of water across a semi-permeable membrane from an area of high water potential (low solute concentration) to an area of low water potential (high solute concentration).
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