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Q. No.Select all routes possible for the transport of water and minerals from root hair to the xylem:
A. Transmembrane route
B. Symplastic route
C. Apoplastic route
D. Stomatal route
E. Endodermis route
Choose the correct answer from the options given below:
1. A, B, C and E only
2. B, C, D and E only
3. A, B, C and D only
4. A, B, D and E only
Subtopic: Water Absorption | Pathways of transport |
71%
From NCERT
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Consider the given two statements:
I. Over small distances, in plants, substances move by diffusion and by cytoplasmic streaming supplemented by active transport.
II. Transport over long distances, in plants, proceeds through the vascular system and is called as transpiration.
1. Only I is correct
2. Only I is incorrect
3. Both I and II are correct
4. Both I and II are incorrect
I. Over small distances, in plants, substances move by diffusion and by cytoplasmic streaming supplemented by active transport.
II. Transport over long distances, in plants, proceeds through the vascular system and is called as transpiration.
1. Only I is correct
2. Only I is incorrect
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Water Absorption | Transpiration & Guttation | Pathways of transport | Introduction to Water Absorption |
55%
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Identify the correct statement regarding the state of plant cells shown as A, B and C in the given diagram:
| A | B | C | |
| 1. | plasmolysed | flaccid | turgid |
| 2. | plasmolysed | turgid | flaccid |
| 3. | flaccid | plasmolysed | turgid |
| 4. | turgid | flaccid | plasmolysed |
Subtopic: Plasmolysis |
84%
From NCERT
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I: After plasmolysis, the gap between the cell wall and the cell membrane in a plant cell is filled with hypertonic solution.
II: If a plant cell is placed in a hyotonic solution, the plant cell loses water and hence turgor pressure by plasmolysis.
1. I is correct and II is also correct and II explains I
2. I is correct but II is incorrect
3. I is incorrect and II is incorrect
4. I is incorrect and II is correct
II: If a plant cell is placed in a hyotonic solution, the plant cell loses water and hence turgor pressure by plasmolysis.
1. I is correct and II is also correct and II explains I
2. I is correct but II is incorrect
3. I is incorrect and II is incorrect
4. I is incorrect and II is correct
Subtopic: Plasmolysis |
72%
From NCERT
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Identify the incorrect statement:
I. Root hairs are thin walled slender extensions of root epidermal cells that greatly increase the surface area for absorption.
II. Water is absorbed along with mineral solutes, by the root hairs, by diffusion as well as by active transport aided by cytoplasmic streaming.
1. Only I
2. Only II
3. Neither I nor II
4. Both I and II
I. Root hairs are thin walled slender extensions of root epidermal cells that greatly increase the surface area for absorption.
II. Water is absorbed along with mineral solutes, by the root hairs, by diffusion as well as by active transport aided by cytoplasmic streaming.
1. Only I
2. Only II
3. Neither I nor II
4. Both I and II
Subtopic: Water Absorption |
From NCERT
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In the diagram, regarding the pathway of water movement in the root, A, B, C and D are:
| A | B | C | D | |
| 1. | Cuticle | Cortex | Pericycle | Endodermis |
| 2. | Epidermis | Cortex | Hypodermis | Endodermis |
| 3. | Hypodermis | Cortex | Endodermis | Pericycle |
| 4. | Epidermis | Cortex | Endodermis | Pericycle |
Subtopic: Pathways of transport |
82%
From NCERT
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Identify the correct statement:
1. Mutual attraction between water molecules called as adhesion, attraction of water molecules to polar surfaces called as cohesion and water molecules being attracted to each other in the liquid phase more than to water in the gas phase called as surface tension are the properties of water that give it a high capillarity which is an ability to resist a pulling force and high tensile strength which is the ability to rise in tubes.
2. Mutual attraction between water molecules called as cohesion, attraction of water molecules to polar surfaces called as adhesion and water molecules being attracted to each other in the liquid phase more than to water in the gas phase called as surface tension are the properties of water that give it a high tensile strength which is an ability to resist a pulling force and high capillarity which is the ability to rise in tubes.
3. Mutual attraction between water molecules called as adhesion, attraction of water molecules to polar surfaces called as cohesion and water molecules being attracted to each other in the liquid phase more than to water in the gas phase called as surface tension are the properties of water that give it a high tensile strength which is an ability to resist a pulling force and high capillarity which is the ability to rise in tubes.
4. Mutual attraction between water molecules called as cohesion, attraction of water molecules to polar surfaces called as adhesion and water molecules being attracted to each other in the liquid phase more than to water in the gas phase called as surface tension are the properties of water that give it a high capillarity which is an ability to resist a pulling force and high tensile strength which is the ability to rise in tubes.
1. Mutual attraction between water molecules called as adhesion, attraction of water molecules to polar surfaces called as cohesion and water molecules being attracted to each other in the liquid phase more than to water in the gas phase called as surface tension are the properties of water that give it a high capillarity which is an ability to resist a pulling force and high tensile strength which is the ability to rise in tubes.
2. Mutual attraction between water molecules called as cohesion, attraction of water molecules to polar surfaces called as adhesion and water molecules being attracted to each other in the liquid phase more than to water in the gas phase called as surface tension are the properties of water that give it a high tensile strength which is an ability to resist a pulling force and high capillarity which is the ability to rise in tubes.
3. Mutual attraction between water molecules called as adhesion, attraction of water molecules to polar surfaces called as cohesion and water molecules being attracted to each other in the liquid phase more than to water in the gas phase called as surface tension are the properties of water that give it a high tensile strength which is an ability to resist a pulling force and high capillarity which is the ability to rise in tubes.
4. Mutual attraction between water molecules called as cohesion, attraction of water molecules to polar surfaces called as adhesion and water molecules being attracted to each other in the liquid phase more than to water in the gas phase called as surface tension are the properties of water that give it a high capillarity which is an ability to resist a pulling force and high tensile strength which is the ability to rise in tubes.
Subtopic: Transpiration & Guttation |
75%
From NCERT
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Control points where a plant adjusts the quantity and types of solutes that reach the xylem are:
1. Suberised casparian strips in the endodermis
2. Sclerenchyma of the pericycle
3. Transport proteins of endodermal cells
4. Root hair cells
1. Suberised casparian strips in the endodermis
2. Sclerenchyma of the pericycle
3. Transport proteins of endodermal cells
4. Root hair cells
Subtopic: Photosynthesis Transpiration Compromise & Mineral Translocation |
51%
From NCERT
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Consider the two statements:
Statement I: The passive movement of ions into the apoplast usually occurs through ion channels, the transmembrane proteins that function as selective pores.
Statement II: The entry or exit of ions to and from symplast requires the expenditure of metabolic energy.
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct and Statement II is incorrect
4. Statement I is incorrect and Statement II is correct
Statement I: The passive movement of ions into the apoplast usually occurs through ion channels, the transmembrane proteins that function as selective pores.
Statement II: The entry or exit of ions to and from symplast requires the expenditure of metabolic energy.
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct and Statement II is incorrect
4. Statement I is incorrect and Statement II is correct
Subtopic: Pathways of transport |
61%
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In higher plants, mineral ions are:
1. translocated through xylem along with the ascending stream of water, which is pulled up through the plant by transpirational pull.
2. translocated through xylem independent of the ascending stream of water, which is pushed up through the plant by root pressure.
3. translocated through phloem along with the ascending translocation of sucrose, which is transported by bulk transport.
4. translocated through phloem independent of the ascending translocation of sucrose, which is pulled up by negative pressure.
1. translocated through xylem along with the ascending stream of water, which is pulled up through the plant by transpirational pull.
2. translocated through xylem independent of the ascending stream of water, which is pushed up through the plant by root pressure.
3. translocated through phloem along with the ascending translocation of sucrose, which is transported by bulk transport.
4. translocated through phloem independent of the ascending translocation of sucrose, which is pulled up by negative pressure.
Subtopic: Long Distance Transport of Water |
70%
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