Water moves

1. Down a gradient of solutes

2. Down a gradient of free energy

3. Above a gradient of water

4. Above a gradient of pressure

Subtopic:  Water Potential Concept |
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Water potential is not

1. Denoted by Greek symbol psi

2. Expressed in pressure units such as Pascals (Pa)

3. At standard temperature not under any pressure, is taken zero

4. Always negative or zero

Subtopic:  Water Potential Concept |
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Find the correct one.

1. All the solutions have lower water potential than pure water given that solution is under external pressure

2. All the solutions have lower water potential than the pure water

3. All the solutions have higher water potential than the pure water

4. All the solutions have lower water potential than pure water unless solution is under such external pressure which is more than the solute potential

Subtopic:  Water Potential Concept |
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Solute potential is

1. More when solute is more

2. Less when solute is less

3. Always negative

4. All of these

Subtopic:  Water Potential Concept |
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For a solution at atmospheric pressure

1. Solute potential is more than water potential

2. Water potential more than solute potential

3. Solute potential is less than water potential

4. Water potential is equal to solute potential

Subtopic:  Water Potential Concept |
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Plants have

1. Positive water potential when cells get turgor pressure

2. Negative water potential when water is transported up a stem

3. Negative pressure is developed in the cell due to turgor pressure

4. Both 1 and 2

Subtopic:  Transpiration & Guttation |
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Cell wall is

1. Freelly permeable

2. Impermeable

3. Semipermeable

4. Selectively permeable

Subtopic:  Osmosis |
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In plant cell, which of the following is important determinants of movement of molecules in or out of the cell?

1. Cell wall

2. Cell membrane

3. Tonoplast

4. Both 2 and 3

Subtopic:  Osmosis |
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Osmosis

1. Diffusion of water across a differentially permeable membrane

2. Diffusion of water across a semipermeable membrane

3. Diffusion of water across a freely permeable membrane

4. Both 1 and 2

Subtopic:  Osmosis |
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The net direction and rate of osmosis depends upon

1. Pressure gradient

2. Concentration gradient

3. Chemical potential

4. All of these

Subtopic:  Osmosis |
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