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Earn 100

What is Facilitated Diffusion? Explain.
Important Questions on Cell Membranes and Transport
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The containers and have litre of pure water and litre of sugar solution, respectively. Which one of the following statements would be correct regarding their water potential and osmotic potential
*Note: There were errors in original KVPY papers, and thus the options are modified here.

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Assertion (): The flow of solvent molecules from a pure solvent to the solution through semipermeable membrane is osmosis.
Reason Pure solvent molecules flow out of the solution through semipermeable membrane if a pressure larger than the osmotic pressure is applied to the solution side.
The correct answer is:

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A. Plasma membrane is a semipermeable membrane
B. Water moves across the pm by osmosis.
C. O2 and CO2 can cross the pm by diffusion.
D. Na+ and K+ ions can pass the pm by diffusion.

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What is diffusion ?

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