Biology for IGCSE & O level - Movement Into And Out Of Cells (Section 4 - No. 46)
Which statement is correct regarding the movement of molecules during diffusion?
Molecules move randomly, with a net movement from high to low concentration.
Molecules move from areas of low concentration to areas of high concentration.
Molecules require energy to diffuse.
Only water molecules can diffuse.
Explanation
Diffusion is the net movement of molecules from a region of higher concentration to a region of lower concentration, which happens passively.
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