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Q. No.Apoplastic movement of water in plants:
1.
involves crossing the cell membrane multiple times
2.
is through mass flow
3.
accounts for a very small fraction of water flow in roots
4.
is relatively much slower than the symplastic flow
Subtopic: Water Absorption |
61%
From NCERT
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Identify the correct statement:
| 1. | Unlike facilitated transport, simple diffusion requires special membrane proteins |
| 2. | Both simple diffusion and facilitated transport are highly selective |
| 3. | Facilitated transport is an uphill transport and requires ATP energy |
| 4. | Both facilitated transport and active transport are liable to saturate |
Subtopic: Diffusion | Means of Transport: Active | Means of Transport: Passive |
81%
From NCERT
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Which of the following statements is correct regarding diffusion:
| 1. | Diffusion of solids rather than diffusion in solids is more likely. |
| 2. | The diffusion rate depends upon the size of the substances; smaller substances diffuse slower |
| 3. | Diffusion is dependent on a living system |
| 4. | Movement by diffusion is passive and no energy expenditure takes place in the process |
Subtopic: Diffusion | Means of Transport: Passive |
79%
From NCERT
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Which one of the following is essential for the process of imbibition to take place?
| I: | Water potential gradient between the adsorbent and the liquid imbibed |
| II: | Affinity between the absorbent and the liquid |
| III: | Affinity between the adsorbent and the liquid |
| IV: | Water potential gradient between the absorbent and the liquid imbibed |
| 1. | Only III and IV | 2. | Only I and II |
| 3. | Only I and III | 4. | Only II and IV |
Subtopic: Imbibition |
From NCERT
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Xylem is associated with the translocation of:
| 1. | a variety of organic and inorganic solutes |
| 2. | water and a variety of organic and inorganic solutes |
| 3. | water, mineral salts, some organic phosphorus and hormones |
| 4. | water, mineral salts, some organic nitrogen and hormones |
Subtopic: Long Distance Transport of Water |
75%
From NCERT
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What could be considered as the most significant contribution of root pressure in the process of water transport?
| 1. | It provides a push which plays a major role in movement of water up the trees |
| 2. | It re-establishes the continuous chain of water molecules in the xylem which often breaks under the enormous tension created by transpiration |
| 3. | It helps in active transport of various ions into the vascular tissues of the root from the soil |
| 4. | It helps in loss of excess water in its liquid phase (guttation) |
Subtopic: Transpiration & Guttation |
71%
From NCERT
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"Girdling Experiment" was performed by Plant Physiologists to identify the plant tissue through which:
| 1. | osmosis is observed |
| 2. | water is transported |
| 3. | food is transported |
| 4. | for both water and food transportation |
Subtopic: The Pressure Flow or Mass Flow Hypothesis |
58%
From NCERT
NEET - 2022
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Which of the following is not observed during apoplastic pathway?
| 1. | Apoplast is continuous and does not provide any barrier to water movement. |
| 2. | Movement of water occurs through intercellular spaces and wall of the cells. |
| 3. | The movement does not involve crossing of cell membrane |
| 4. | The movement is aided by cytoplasmic streaming |
Subtopic: Pathways of transport |
64%
From NCERT
NEET - 2022
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Addition of more solutes in a given solution will:
1. not affect the water potential at all
2. raise its water potential
3. lower its water potential
4. make its water potential zero
Subtopic: Plant Water Relations: Water Potential: DPD |
82%
From NCERT
NEET - 2022
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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 |
80%
From NCERT
NEET - 2022
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