Movement of ions and large molecules with the help of protein molecules in and out of the cell is called _
Correct answer: B. Facilitated diffusion
- A. Diffusion
- B. Facilitated diffusion
- C. Passive transport
- D. Osmosis
Explanation
Diffusion is the passive movement of molecules down the concentration gradient whereas osmosis is the passive movement of water down the water potential gradient across a semi-permeable membrane. On the contrary, facilitated diffusion is the passive movement of molecules down the concentration gradient with the help of transport proteins (as these molecules/ions are incapable of moving through cell membranes directly).
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