EASY
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The phenomenon of recovery of turgidity due to endosmosis of water is known as deplasmolysis or plasmolysis?

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Important Questions on Cell Membranes and Transport

EASY

The containers X and Y have 1 litre of pure water and 1 litre of 0.1 M sugar solution, respectively. Which one of the following statements would be correct regarding their water potential Ψ and osmotic potential Ψs?

*Note: There were errors in original KVPY papers, and thus the options are modified here.

HARD
Which of the following elements is responsible for maintaining turgor in cells?
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Which of the following physico-chemical techniques is commonly used to desalinate brackish water?
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The water potential ψp of pure water at standard temperature and atmospheric pressure is:
MEDIUM

Assertion (A): The flow of solvent molecules from a pure solvent to the solution through semipermeable membrane is osmosis.

Reason (R): 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:

EASY
How the molecules of water would behave if pure water is separated from a colloidal suspension with the help of a selectively permeable membrane. It would cause a net movement of water to
MEDIUM
Which one of the following denotes the water potential of the mesophyll cell in wilted condition?
HARD
Which of the following statements are true/false?

1. The positive hydrostatic pressure is called turgor pressure.

2. Wall pressure exerts to prevent the increase of protoplasm size.

3. Diffusion is more rapid in liquids than in gases.

4. Diffusion of water through a semi-permeable membrane is called imbibition.

5. Osmosis is movement of substance, which takes place along a diffusion gradient.
EASY
Assume that an actively respiring cell has 3x number of K+ in its cytoplasm and 2x number of K+ entered into the cell. What is the process by which K+ transport has taken place?
MEDIUM
Whose water potential is less than the water potential of root hair during the water absorption by root hair?
EASY
In a plasmolysed cell, the space between the nucleus and plasma membrane is occupied by
EASY
Cell 'A' has solute potential of -3 atm and pressure potential of 1 atm, while cell 'B' has solute potential of -4 atm and pressure potential of 3 atm. If these cells are adjacent to each other, the result will be
HARD
Cell-A has osmotic potential of -18 bars and pressure potential of 8 bars, whereas, cell-B has osmotic potential of -14 bars and pressure potential 2 bars. The direction of flow of water will be