If a pressure greater than atmospheric pressure is applied to a solution, its water potential:

1. Increases

2. Decreases

3. Remains the same

4. Becomes zero

Consider the following:

I.    A decrease in pressure on cell exerted by the wall
II.   An increase in water potential of the surroundings
III.  The uptake of solutes by the cell
IV.  An increase in the tension on the surrounding solution

Which of the above would contribute to the uptake of water by the cell?

1. I, II, III

2. II, III, IV

3. I, II, IV

4. I, III, IV

In plants, water moves from

1. less negative to more negative potential

2. more negative to less negative potential

3. same potentials

4. none of the above.

The modified equation for water potential is:

1. ${\mathrm{\Psi }}_{\mathrm{w}}=$ ${\mathrm{\Psi }}_{\mathrm{s}}$ $+$ ${\mathrm{\Psi }}_{\mathrm{p}}$

2. ${\mathrm{\Psi }}_{\mathrm{w}}$ $=$ ${\mathrm{\Psi }}_{\mathrm{s}}-{\mathrm{\Psi }}_{\mathrm{p}}$

3. ${\mathrm{\Psi }}_{\mathrm{w}}={\mathrm{\Psi }}_{\mathrm{s}}$

4. ${\mathrm{\Psi }}_{\mathrm{w}}={\mathrm{\Psi }}_{\mathrm{p}}-{\mathrm{\Psi }}_{\mathrm{s}}$

Cell A has osmotic potential of -18 bars and pressure potential of 8 bars, whereas, cell B has osmotic potential of -14 bars and pressure potential 2 bars. The direction of flow of water will be

(1) from cell B to cell A

(2) from cell A to cell B

(3) no flow of water

(4) in both the directions

Which of the following is the two major components of water potential

1. Solute potential and osmotic pressure

2. Solute potential and pressure potential

3. Osmotic pressure and turgor pressure

4. Osmotic pressure and solute concentration

Water molecules show a motion

The greater water potential actually does not suggest the

1. Greater concentration of water

2. Greater Kinetic Energy

3. Less solute concentration

4. Lower solute potential

Water movement is observed

1. From high water potential to lower water potential

2. From low solute potential to high solute potential

3. From low pressure potential to high pressure potential

4. From high solute concentration to low solute concentration

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