HARD
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Which pressure is zero in a flaccid cell?

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Important Questions on Transport in Plants

EASY
Excess salt inhibits bacterial growth in pickles by
EASY
Which of the following physico-chemical techniques is commonly used to desalinate brackish water?
HARD
Which of the following elements is responsible for maintaining turgor in cells?
MEDIUM
The concentration of OH - ions in a solution with the H+ ions concentration of 1.3×10-4M is
EASY
The salting of pickles is an example for
EASY
If the H+ concentration of an aqueous solution is 0.001M,, then the pOH of the solution would be
EASY
Addition of more solutes in a given solution will:
MEDIUM
The pH of an aqueous solution of 10-8MHCl is
EASY
The water potential ψp of pure water at standard temperature and atmospheric pressure is:
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.

EASY
Water potential of pure water at standard temperature is ________
EASY
The magnitude of increment in water potential in a turgid cell is called ________
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
The water potential of pure water is
MEDIUM

Assertion (A): Pea seeds swell more on imbibition than wheat seeds.

Reason (R): Proteins have a high imbibing capacity.

EASY
Dry wooden stakes, if driven into a small crack in a rock and then soaked, can develop enough pressure to split the rock. Such pressure is build up through the phenomenon of
MEDIUM
Percentage of water left in the soil when a plant wilts, is known as:
MEDIUM
From active hydathodes, the water comes out by
EASY
Under given suitable conditions, the DPD will be more than OP