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Q. No.In terms of fixing carbon dioxide, when compared to a C3 plant, a C4 plant:
1.
is twice as efficient and loses only half as much water for the same amount of carbon dioxide fixed.
2.
is equally efficient and loses only half as much water for the same amount of carbon dioxide fixed.
3.
is twice as efficient and loses same amount of water for the same amount of carbon dioxide fixed.
4.
is equally efficient and loses same amount of water for the same amount of carbon dioxide fixed.
Subtopic: Photosynthesis Transpiration Compromise & Mineral Translocation |
89%
From NCERT
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When water flows into the cell and out of the cell and are in equilibrium, the cells are said to be:
1. Flaccid
2. Plasmolysed
3. Turgid
4. Wilted
Subtopic: Plant Water Relations: Plasmolysis |
79%
From NCERT
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In facilitated diffusion, membrane proteins:
| I: | provide sites at which molecules cross the membrane against the concentration gradient. |
| II: | set up a concentration gradient for diffusion to occur. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Facilitated Diffusion |
From NCERT
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By convention, the water potential of pure water at standard temperatures, which is not under any pressure, is take to be:
1. 0 MPa
2. 760 Mpa
3. - 5 Mpa
4. 1.0 MPa
Subtopic: Plant Water Relations: Water Potential: DPD |
88%
From NCERT
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Consider the two given statements regarding mass or bulk flow in plants:
| Statement I: | It is a characteristic of mass flow that substances, whether in solution or in suspension, are swept along at the same pace. |
| Statement II: | Bulk flow can be achieved only through a negative hydrostatic pressure gradient. |
| 1. | Statement I is correct; Statement II is incorrect |
| 2. | Statement I is correct; Statement II is correct |
| 3. | Statement I is incorrect; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is correct |
Subtopic: Phloem Translocation: Short Distance Transport | Phloem Translocation |
70%
From NCERT
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When a carrier protein facilitates the movement of two molecules across the membrane in opposite direction, it is called :
1. Uniport
2. Transport
3. Antiport
4. Symport
1. Uniport
2. Transport
3. Antiport
4. Symport
Subtopic: Means of Transport: Active | Means of Transport: Passive |
92%
From NCERT
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Given below are two statements:
In light of the above statements, choose the most appropriate answer from the options given below :
1. Statement I is incorrect but Statement II is correct
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
| Statement I: | The forces generated by transpiration can lift a xylem-sized column of water over 130 meters height. |
| Statement II: | Transpiration cools leaf surfaces sometimes 10 to 15 degrees, by evaporative cooling. |
1. Statement I is incorrect but Statement II is correct
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
Subtopic: Transpiration & Guttation | Photosynthesis Transpiration Compromise & Mineral Translocation |
69%
From NCERT
NEET - 2023
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Movement and accumulation of ions across a membrane against their concentration gradient can be explained by:
| 1. | Active Transport | 2. | Osmosis |
| 3. | Facilitated Diffusion | 4. | Passive Transport |
Subtopic: Means of Transport: Active |
71%
From NCERT
NEET - 2023
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Match List I with List II:
Choose the correct answer from the options given below:
| List I | List II | ||
| A. | Cohesion | I. | More attraction in liquid phase |
| B. | Adhesion | II. | Mutual attraction among water molecules |
| C. | Surface tension | III. | Water loss in liquid phase |
| D. | Guttation | IV. | Attraction towards polar surfaces |
| Options: | A | B | C | D |
| 1. | II | I | IV | III |
| 2. | II | IV | I | III |
| 3. | IV | III | II | I |
| 4. | III | I | IV | II |
Subtopic: Transpiration & Guttation |
59%
From NCERT
NEET - 2023
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Identify the correct statements regarding Mass flow hypothesis.
Choose the correct answer from the options given below:
| A: | Mass flow is faster than diffusion. |
| B: | Mass flow is the result of pressure difference between the end points. |
| C: | Different substances involved in mass flow move at different paces. |
| D: | Mass flow can result through either a positive or a negative hydrostatic pressure gradient. |
| 1. | (A), (C), (D) only | 2. | (B), (C), (D) only |
| 3. | (A), (B), (C) only | 4. | (A), (B), (D) only |
Subtopic: The Pressure Flow or Mass Flow Hypothesis |
From NCERT
NEET - 2023
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