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Question

Based on the figure given below which of the following statements is not correct?

  1. The direction and rate of osmosis depends on both the pressure gradient and concentration gradient
  2. Movement of solvent molecules will take place from chamber A to B
  3. Movement of solute also will take place from A to B
  4. Presence of a semipermeable membrane is a pre-requisite for this process to occur


Solution

The correct option is C Movement of solute also will take place from A to B
Solute cannot move across a semi-permeable membrane unless facilitated through channels or special carrier proteins. Therefore only B is incorrect.
All the other statements are true for osmosis- solvent molecule that is water moves from the region of higher water potential to the region of lower water potential. Osmotic movement is also dependent on pressure gradient.

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