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Q. No.
Assertion(A): Water minerals and food can be moved within the body of a plant by diffusion alone.
Reason(R): Translocation of nutrients and food in a tree occurs by a mass flow system.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Phloem Translocation |
74%
From NCERT
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Assertion (A): Positive pressure theory is best explanation for translocation in phloem.
Reason (R): The net gain of ATP produced during aerobic, anaerobic and HMP are 36, 2, and 35 respectively
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): The net gain of ATP produced during aerobic, anaerobic and HMP are 36, 2, and 35 respectively
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
63%
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Assertion (A): Guard cells of stomata are having thick and elastic cell wall.
Reason (R): Elastic wall is due to radial arrangement of cellulose microfibrils.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): Elastic wall is due to radial arrangement of cellulose microfibrils.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Transpiration & Guttation |
64%
From NCERT
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Under what conditions guttation is most likely to take place?
| Root pressure | Rate of transpiration | |
| 1. | High | Low |
| 2. | Low | High |
| 3. | Low | Low |
| 4. | High | High |
Subtopic: Transpiration & Guttation |
79%
From NCERT
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Two protein molecules move passively in opposite directions and independently of each other across a cell membrane. The transport is known as:
1. Uniport
2. Symport
3. Co-transport
4. Antiport
1. Uniport
2. Symport
3. Co-transport
4. Antiport
Subtopic: Means of Transport: Passive |
83%
From NCERT
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Which means of transport is very important to plants since it is the only means for gaseous movement within the plant body?
| 1. | Diffusion |
| 2. | Facilitated diffusion |
| 3. | Active transport |
| 4. | Secondary active co-transport |
Subtopic: Diffusion |
87%
From NCERT
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All the following are purposes served by transpiration in plants except:
| 1. | It creates transpiration pull for absorption and transport in plants. |
| 2. | It supplies water for photosynthesis. |
| 3. | It warms leaf surfaces to activate enzymes for carbon fixation. |
| 4. | It maintains the shape and structure of the plants by keeping cells turgid. |
Subtopic: Transpiration & Guttation |
82%
From NCERT
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Match each item in COLUMN I with one in COLUMN II and select the correct match from the codes given:
Codes:
| COLUMN I [Property of water] |
COLUMN II [Description] |
||
| A | Cohesion | P | An ability to resist a pulling force |
| B | Adhesion | Q | The ability to rise in thin tubes |
| C | Tensile strength | R | Mutual attraction between water molecules |
| D | Capillarity | S | Attraction of water molecules to polar surfaces |
| A | B | C | D | |
| 1. | R | S | P | Q |
| 2. | R | S | Q | P |
| 3. | P | Q | R | S |
| 4. | P | Q | S | R |
Subtopic: Transpiration & Guttation |
91%
From NCERT
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Consider the given two statements:
| Statement I: | At the source sugars are actively transported in to a sieve tube. |
| Statement II: | At the sink incoming sugars are passively transported out of the phloem. |
| 1. | Statement I is incorrect; Statement II is incorrect |
| 2. | Statement I is incorrect; Statement II is correct |
| 3. | Statement I is correct; Statement II is incorrect |
| 4. | Statement I is correct; Statement II is correct |
Subtopic: Phloem Translocation |
73%
From NCERT
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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 |
88%
From NCERT
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