NEET Biology question

Not in NEET syllabus

Suppose the solute concentration in three plant cells is 0.7 M. These are placed in three separate small test tubes T₁, T₂ and T₃ having solutions with concentrations of 0.2 M, 3 M and 0.7 M respectively. Accordingly, which of the following is true?

(A)Cell placed in T₁ will have no change of shape; that placed in T₂ will swell; and the one placed in T₃ will undergo plasmolysis
(B)Cell placed in T₁ will swell; that placed in T₂ will undergo plasmolysis; and the one placed in T₃ will have no change of shapeCorrect
(C)Cell placed in T₁ will undergo plasmolysis; that placed in T₂ will swell; and the one placed in T₃ will have no change of shape
(D)Cell placed in T₁ will swell; that placed in T₂ will have no change of shape; and the one placed in T₃ will undergo plasmolysis

Answer: (B)

Solution

T₁ (0.2 M) is hypotonic to the 0.7 M cell, so water enters by endosmosis and the cell swells. T₂ (3 M) is hypertonic to the cell, so water exits by

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Question ID VK-127985