Water Potential

Q. Net movement of water is from

1. low DPD to high DPD
2. high DPD to low DPD
3. DPD gradient plays no role
4. none of the above

Q. As a result of endosmosis, $\psi$${}_w$ of a cell

1. increases
2. decreases
3. remains same
4. become zero

Q. Choose the factors which can affect the water potential.

1. Solute conc.
2. Pressure
3. Solute addition
4. Gravity
5. Temperature
6. Humidity
7. Matrix potential
8. Salt conc.

Q. If a cell is placed in an isotonic solution, the water potential and will be equal inside and outside of the cell.

1. solute potential
2. water pressure
3. pressure potential
4. turgor pressure

Q. Cell ‘A’ with OP = 10 atm and TP = 5 atm is in contact with a cell ‘B’ having OP = 15 atm and TP =12 atm. The flow of water will be

1. from A to B
2. from B to A
3. equal flow
4. no flow

Q.

Arrange the water potential values of the following in ascending sequence during upward movement of water.

A. Atmosphere

B. Leaf xylem

C. Xylem of the stem

D. Root xylem

E. Soil solution

1. ABCDE

2. EDCBA

3. EDABC

4. ABDCE

Q. Water potential of a solution is depicted by

1. 𝜳p
2. 𝜳w
3. 𝜳s
4. all of the above

Q. is the force which drives osmosis.

1. Osmotic pressure
2. Diffusion pressure
3. Water potential
4. Vapour pressure

Q. Under conditions of bright light, which part of the transpiring plant will have the lowest water potential?

1. Xylem vessels in the leaves
2. Xylem vessels in the roots
3. Root hairs
4. Spongy mesophyll of the leaves