Consider the two statements:
I. After plasmolysis the gap between the cell wall and the cell membrane in a plant cell is filled with hypertonic solution.
II. The cell collapses, and the cell membrane pulls away from the cell wall (in plants).
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct and II is incorrect
4. Both I and II are incorrect

Subtopic:  Plasmolysis |
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The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and early morning is:

1. Root pressure

2. Imbibition

3. Plasmolysis

4. Transpiration

Subtopic:  Transpiration & Guttation |
 69%
From NCERT
NEET - 2020
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Which of the following statements is true for the diagrams? 

1. The beet core in beaker A is at equilibrium with the surrounding water.
2. The beet core in beaker B will lose water to the surrounding environment.
3. The beet core in beaker B would be more turgid than the beet core in beaker A.
4. The beet core in beaker A is likely to gain so much water that its cells will rupture.

Subtopic:  Water Potential Concept |
 69%
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Which bag would you predict to show the least change in mass at the end of the experiment? 

1. The bag in Beaker 1
2. The bag in Beaker 2
3. The bag in Beaker 3
4. The bag in Beaker

Subtopic:  Water Potential Concept |
 83%
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What is not true regarding bulk transport in plants?
1. It is driven primarily by pressure potential.
2. It depends on a difference in pressure potential at the source and sink.
3. Substances in a solution or suspension move along their individual concentration gradients
4. It may be the result of either positive or negative pressure potential.

Subtopic:  Long Distance Transport of Water |
 64%
From NCERT
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A water molecule taken up by the root of the plant from the soil can reach the leaf by passing through a living cell only once. This cell is:
1. root epidermal cell
2. the endodermis
3. a guard cell
4. the root cortex cell

Subtopic:  Water Absorption |
 66%
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Identify the incorrect statement:
1. The water potential of pure water at standard temperature, which is not under any pressure, is taken to be zero.
2. Adding solute to pure water reduces its water potential.
3. The more the solute molecules, the lower [more negative] is the solute potential.
4. If a pressure greater than atmospheric pressure is applied to pure water or a solution, its water potential decreases.

Subtopic:  Water Potential Concept |
 79%
From NCERT
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Both simple diffusion and facilitated diffusion:
1. require special membrane proteins
2. are highly selective in nature
3. do not require ATP energy
4. are uphill transports

Subtopic:  Means of Transport: Passive |
 85%
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Select the incorrect statement.

1. Transport of molecules in phloem can be bidirectional.
2. The movement of minerals in the xylem is unidirectional.
3. Unloading of sucrose at the sink does not involve the utilization of ATP.
4. Elements most easily mobilized in plants from one region to another are phosphorus, sulfur, nitrogen, and potassium.

Subtopic:  The Pressure Flow or Mass Flow Hypothesis |
 81%
From NCERT
NEET - 2020
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What will be the direction of flow of water when a plant cell is placed in a Hypotonic solution?

1. Water will flow in both directions.

2. Water will flow out of the cell.

3. Water will flow into the cell.

4. No flow of water in any direction.

Subtopic:  Plasmolysis |
 81%
From NCERT
NEET - 2019
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