Pressure Potential

Q.

Difference between turgor pressure and pressure potential.

Q.

Give any two examples of endosmosis and exosmosis.

Q.

Explain the terms exosmosis and endosmosis. How can you demonstrate these processes easily?

Q. Explain hydrostatic paradox .

Q.

What would be the pressure potential of a placcid cell ?

Q.

Exosmosis tends to cause the shrinkage of the cell whereas endosmosis tends to swells up the cell.

1. True
2. False

Q. Value of osmotic potential $\left(\pi \right)$ and pressure potential (p) of cells a, b, c, d are given:

Cell	$\pi$	p
a	1.0	0.5
b	0.6	0.3
c	1.2	0.6
d	0.8	0.4

Identify the correct sequence for movement of water.

1. b $⟶$ c $⟶$ d $⟶$ a
2. c $⟶$ b $⟶$ a $⟶$ d
3. d $⟶$ c $⟶$ a $⟶$ b
4. b $⟶$ d $⟶$ a $⟶$ c

Q. What would be ${\Psi }_p$ of a flaccid cell? Which organisms other than plants possess cell wall?

Q. Highest value of $\psi$ is

1. 1
2. 0
3. 10
4. 100

Q.

What is the direction of net osmotic movement of water of a solution $A$ enclosed in a semipermeable membrane having an osmotic potential $-30$ bars and pressure potential $5$ bars is surrounded in a solution $B$ of osmotic potential$-10$ bars and pressure potential$=0?$

1. $A\to B$
2. $B\to A$
3. No movement
4. Equal amount

Q. Differences between positive hydrostatic pressure gradient and negative hydrostatic pressure.

Q.

Differentiate between exosmosis and endosmosis.

Q. Solution A has ${\Psi }_s=-30$ bars and ${\Psi }_p=5$ bars. Solution B has ${\Psi }_s=-10$ bars and ${\Psi }_p=0$ atm. The two are separated by semipermeable membrane. Flow of water will be

1. No flow of water
2. B to A
3. A to B
4. Equal in both directions

Q. Pressure potential in a plasmolysed cell is

1. Positive
2. Zero
3. Remains same
4. Negative

Q. Which option is true for a fully turgid cell?

1. OP $=$ DPD
2. OP $=$ zero
3. DPD $=$ Zero
4. TP $=$ Zero

Q. Describe an activity to show the effect of low pressure and particulate nuclei over water vapours?

Q. In a fully turgid cell

1. Both ${\Psi }_s$ and ${\Psi }_p$ are negative
2. ${\Psi }_s$ is negative and ${\Psi }_p$ is positive
3. ${\Psi }_p$ is negative and ${\Psi }_s$ is positive
4. Both ${\Psi }_p$ and ${\Psi }_s$ are positive

Q. What would be the Ψp of a flaccid cell? Which organisms other than plants possess cell wall?

Q. If a plant cell is immersed in water, the water continues to enter the cell until the

1. Concentration of the salt is the same inside the cell as outside
2. Cell bursts
3. Diffusion pressure is the same on inside the cell as outside
4. Concentration of the water is the same inside the cell as outside

Q. Addition of a solute to pure water causes

1. More negative water potential
2. Negative water potential
3. More positive water potential
4. Positive water potential

Q.

What happens when a pressure greater than the atmospheric pressure is applied to pure water or a solution?

Q. Which values for solute potential and pressure potential at standard temperature will favour the movement of water from chamber B to chamber A?

1. ${\psi }_s\left(X\right)=-8bar:{\psi }_p\left(X\right)=7bar$
   ${\psi }_s\left(Y\right)=-3bar:{\psi }_p\left(Y\right)=1bar$
2. ${\psi }_s\left(X\right)=-5bar:{\psi }_p\left(X\right)=3bar$
   ${\psi }_s\left(Y\right)=-5bar:{\psi }_p\left(Y\right)=2bar$
3. ${\psi }_s\left(X\right)=-6bar:{\psi }_p\left(X\right)=4bar$
   ${\psi }_s\left(Y\right)=-4bar:{\psi }_p\left(Y\right)=3bar$
4. ${\psi }_s\left(X\right)=-6bar:{\psi }_p\left(X\right)=5bar$
   ${\psi }_s\left(Y\right)=-7bar:{\psi }_p\left(Y\right)=2bar$

Q. If the OP of any osmotic system is 35 atm and its turgor pressure 9 units. Find out water potential present in the osmotic system.

1. - 44 unit
2. - 26 unit
3. - 3.88 unit
4. 26 unit

Q. What is positive hydrostatic pressure and negative hydrostatic pressure??

Q. In a plant cell DPD is zero when it is

1. Plasmolysed
2. Turgid
3. Flaccid
4. Incipient

Q. Solute potential can be expressed as

1. $\Psi s=-OP$
2. $\Psi s=OP$
3. $OP-\Psi s=0$
4. $\frac{\Psi s}{OP}=0$