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NEET Practice Questions (MCQs) with Answers & Solutions

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A force exists between the walls of xylem vessels and water.

A. Cohesion B. Gravitational C. Adhesive D. Transpiration pull

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Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure - 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure - 3 atm and diffusion pressure deficit 5 atm. The result will be

Movement of water from cell B to A.

No movement of water.

Equilibrium between the two.

Movement of water from cell A to B.

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Explanation

The direction of movement of water is from low to high DPD, i.e., from 3 atm in cell A to 5 atm in cell B.

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The +ve value of Î¨ P is called ..........

A. Osmotic pressure B. Root pressure C. Turgor pressure D. Imbibation pressure

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In older dying leaves to younger leaves the mineral ions are assimilated into ..........

A. Inorganic compound B. Organic compound C. Deposition of Inorganic compound and organic compound. D. None of the above

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In term of fixing COd₂d , Cd₄d plants________- are efficient as Cd₃d plants.

A. Thrice B. Twice C. Less D. Not

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When a cell is placed in 0.50M concentrated sugar solution, there is no change in it. So the external solution is called ..........

A. Hypertonic B. Isotonic C. Hypotonic D. Colloidal

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The pressure that prevails in cell due to number of substances dissolved in cell sap is ..........

A. Wall pressure B. Turgor pressure C. Osmotic pressure D. Diffusion pressure

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The plasmolysed cells regain turgidity and assume original volume under influence of hypotonic solution. The process is called

A. Plasmolysis B. Deplasmolysis C. Endo osmosis D. Exo osmosis

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An animal cell placed in pure water will

A. Swellup and brust B. Shrink and die C. Shrink and undergo plasmolysis D. Swellup and develop turgidity

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Passage of water across a selectively permeable membrane is

A. Active transport B. Pinocytosis C. Facilitated diffusion D. Osmosis

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