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Q. No.Which of the following statements above facilitated diffusion is incorrect?
1.
Special proteins of the membrane help in this process
2.
Porins are involved in this process
3.
Movement of the molecule occurs against the concentration gradient
4.
ATP is not required for this process
Subtopic: Facilitated Diffusion |
81%
From NCERT
NEET - 2022
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Phloem sap in the plants mainly consists of :
1. fructose and water
2. fructose and sucrose
3. glucose and water
4. sucrose and water
Subtopic: Phloem Translocation |
76%
From NCERT
NEET - 2022
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Which of the following physical properties of water is/are responsible for providing water, the high tensile strength and high capillarity during ascent of sap in the plants?
1. Surface tension and cohesion
2. Cohesion, adhesion and surface tension
3. Cohesion only
4. Adhesion and cohesion
Subtopic: Transpiration & Guttation |
84%
From NCERT
NEET - 2022
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Which of the following was proved by girdling experiment?
| 1. | Apoplastic movement of water occurs through intercellular spaces |
| 2. | Symplastic movement of water occurs through interconnected protoplast |
| 3. | Xylem is responsible for uptake of water |
| 4. | Phloem is responsible for translocation of food |
Subtopic: Phloem Translocation |
84%
From NCERT
NEET - 2022
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Most of the water taken up by a plant is
1. used as a solvent.
2. used as a hydrogen source in photosynthesis.
3. lost during transpiration
4. converted to CO2
1. used as a solvent.
2. used as a hydrogen source in photosynthesis.
3. lost during transpiration
4. converted to CO2
Subtopic: Transpiration & Guttation |
87%
From NCERT
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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.
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%
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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 |
90%
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 |
65%
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