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Q. No.The movement of water across biological membranes can best be predicted by
1. negative charges in the cell wall
2. prevailing weather conditions.
3. aquaporins
4. water potential.
Subtopic: Water Potential Concept | Water Absorption |
62%
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Compared to a cell with few aquaporins in its membrane, a cell containing many aquaporins will
1. have a faster rate of osmosis
2. have a lower water potential.
3. have a higher water potential.
4. have a faster rate of active transport
1. have a faster rate of osmosis
2. have a lower water potential.
3. have a higher water potential.
4. have a faster rate of active transport
Subtopic: Water Potential Concept |
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In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
A: Water and mineral uptake by root hairs from the soil occurs through apoplast until it reaches endodermis.
R: Casparian strips in endodermis are suberized.
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
A: Water and mineral uptake by root hairs from the soil occurs through apoplast until it reaches endodermis.
R: Casparian strips in endodermis are suberized.
Subtopic: Water Absorption | Pathways of Transport: Illustration |
75%
From NCERT
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All of the following have an effect on water potential (Ψ) in plants except
1. physical pressure
2. water-attracting matrices
3. dissolved solutes
4. DNA structure
1. physical pressure
2. water-attracting matrices
3. dissolved solutes
4. DNA structure
Subtopic: Water Potential Concept |
89%
From NCERT
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Active transport involves all of the following except the
1. diffusion of solute through the lipid bilayer of a membrane.
2. pumping of solutes across the membrane.
3. hydrolysis of ATP.
4. transport of solute against a concentration gradient.
1. diffusion of solute through the lipid bilayer of a membrane.
2. pumping of solutes across the membrane.
3. hydrolysis of ATP.
4. transport of solute against a concentration gradient.
Subtopic: Means of Transport: Active |
64%
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A: Waxy and cutin coating on plant parts reduce the transpiration.
R: These adaptation are found in xerophytes.
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
R: These adaptation are found in xerophytes.
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Transpiration & Guttation |
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Given below are two statements
Statement I: The greater is the concentration of water in a system, lower is its kinetic energy or water potential
Statement II: Pure water will have the lowest water potential
In light of the above statements, choose the most appropriate answer from the options given below
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but statement II is incorrect
4. Statement I is incorrect but Statement II is correct
Statement I: The greater is the concentration of water in a system, lower is its kinetic energy or water potential
Statement II: Pure water will have the lowest water potential
In light of the above statements, choose the most appropriate answer from the options given below
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but statement II is incorrect
4. Statement I is incorrect but Statement II is correct
Subtopic: Water Potential Concept |
69%
From NCERT
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Given below are two statements:
Statement I: Exudation of water droplets on the tips and edges of plant leaves is called guttation. It is caused by root pressure that forces more water to enter leaves than is transpired
Statement II: Transpiration is a 'pulling' process, hence exploration of the rise of xylem sap by cohesion-tension mechanism begins not with roots but with leaves, where the driving force for transpirational pull begins
In light of the above statements, choose the most appropriate answer from the options given below
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct
Statement I: Exudation of water droplets on the tips and edges of plant leaves is called guttation. It is caused by root pressure that forces more water to enter leaves than is transpired
Statement II: Transpiration is a 'pulling' process, hence exploration of the rise of xylem sap by cohesion-tension mechanism begins not with roots but with leaves, where the driving force for transpirational pull begins
In light of the above statements, choose the most appropriate answer from the options given below
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct
Subtopic: Transpiration & Guttation |
73%
From NCERT
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Select the order of the flow of water in the roots.
A. Cortex
B. Pericycle
C. Xylem
D. Epidermis
E. Endodermis
Chose the correct answer from the options given below
1. D → E → A → B → C
2. D → A → B → E → C
3. A → B → D → C → E
4. D → A → E → B → C
A. Cortex
B. Pericycle
C. Xylem
D. Epidermis
E. Endodermis
Chose the correct answer from the options given below
1. D → E → A → B → C
2. D → A → B → E → C
3. A → B → D → C → E
4. D → A → E → B → C
Subtopic: Pathways of transport |
69%
From NCERT
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Given below are two statements
Statement I: In the process of water movement in plants "roots pressure" is responsible for pushing up water to small height in the stem.
Statement II: "Root pressure" is responsible for upward flow of water through the xylem.
In light of the above statements, choose the most appropriate answer from the options given below
1. Both statement I and statement II are true
2. Both statement I and statement II are false
3. Statement I is correct but statement II is false
4. Statement I is incorrect but statement II is ture
Statement I: In the process of water movement in plants "roots pressure" is responsible for pushing up water to small height in the stem.
Statement II: "Root pressure" is responsible for upward flow of water through the xylem.
In light of the above statements, choose the most appropriate answer from the options given below
1. Both statement I and statement II are true
2. Both statement I and statement II are false
3. Statement I is correct but statement II is false
4. Statement I is incorrect but statement II is ture
Subtopic: Ascent of Sap | Transpiration & Guttation |
71%
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