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Q. No.Given below are two statements:
Assertion (A):
Water from stomata diffuses into the surrounding air.
Reason (R):
There is lower concentration of water in the atmosphere as compared to sub-stomatal cavities.
1.
Both (A) and (R) are true and (R) is the correct explanation of (A).
2.
Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.
(A) is true but (R) is false.
4.
Both (A) and (R) are false.
Subtopic: Transpiration & Guttation |
85%
From NCERT
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In which of the following conditions, \(\psi_{w}\) of a solution will increase.
a. Dilution the solution
b. Addition of solutes
c. Applying pressure greater than atmospheric pressure
1. a, b and c all
2. a and b only
3. b and c only
4. a and c only
a. Dilution the solution
b. Addition of solutes
c. Applying pressure greater than atmospheric pressure
1. a, b and c all
2. a and b only
3. b and c only
4. a and c only
Subtopic: Water Potential Concept |
69%
From NCERT
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A mature corn plant of 750 gm weight absorbs approx how much litres of water in a day?
1. 3 litres
2. 14 litres
3. 750 litres
4. 1000 litres
1. 3 litres
2. 14 litres
3. 750 litres
4. 1000 litres
Subtopic: Plant Water Relations: Reverse Osmosis & Water potential: 1 |
68%
From NCERT
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Facilitated and active transport both show transport saturation because
1. Both undergo uphill transport
2. Both processes are conducted by transport protein
3. Both are regulated by hormones.
4. Both are highly specific.
1. Both undergo uphill transport
2. Both processes are conducted by transport protein
3. Both are regulated by hormones.
4. Both are highly specific.
Subtopic: Facilitated Diffusion |
70%
From NCERT
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Find the correct expression.
| 1. | \(\psi_{s}=\psi_{w}+\psi_{p}\) |
| 2. | Wall pressure + Turgor pressure = Osmotic pressure |
| 3. | Solute potential = Osmotic potential - Osmotic pressure |
| 4. | Wall pressure = Osmotic pressure + Osmotic potential |
Subtopic: Water Potential Concept |
From NCERT
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A transmembrane protein that moves two types of molecules in opposite direction without any need of ATP is a/an
1. Active transport
2. Passive symport
3. Active uniport
4. Passive antiport
1. Active transport
2. Passive symport
3. Active uniport
4. Passive antiport
Subtopic: Means of Transport: Passive |
69%
From NCERT
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Water potential of a solution at standard temperature and atmospheric pressure is
1. Zero pascals
2. Positive
3. Negative
4. Can't be determined
1. Zero pascals
2. Positive
3. Negative
4. Can't be determined
Subtopic: Water Potential Concept |
From NCERT
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When a flaccid plant cell is placed in pure water
| 1. | Water enters into the cell eventually rupturing it |
| 2. | Water enters into the cell and turgor pressure is developed |
| 3. | Water comes out of the cell making it plasmolysed |
| 4. | Net movement of water will be zero |
Subtopic: Plasmolysis |
55%
From NCERT
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A plant cell with \(\psi_{s}=-0.03\ MPa\) and \(\psi_{p}=-0.25\ MPa\) is placed in pure water at standard temperature and pressure. The net movement of water will be
1. into the cell
2. out of the cell
3. zero
4. first inside the cell and then out of the cell
1. into the cell
2. out of the cell
3. zero
4. first inside the cell and then out of the cell
Subtopic: Water Potential Concept |
55%
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Hints
Match the given columns and select the correct option
1. a-ii, b-i, c-iii, d-iv
2. a-ii, b-iv, c-iii, d-i
3. a-iii, b-i, c-iv, d-iv
4. a-iv, b-i, c-ii, d-iii
| (a) | Imbibition pressure | i. | Responsible for enlargement and extension growth of cell |
| (b) | Turgor pressure | ii. | Used by prehistoric man to split rocks and boulder |
| (c) | Mass or bulk inflow | iii. | Depends on pressure differences |
| (d) | Osmosis | iv. | Depends on both pressure and concentration gradient |
1. a-ii, b-i, c-iii, d-iv
2. a-ii, b-iv, c-iii, d-i
3. a-iii, b-i, c-iv, d-iv
4. a-iv, b-i, c-ii, d-iii
Subtopic: Imbibition |
70%
From NCERT
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