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Q. No.
Assertion(A): The direction of movement in the phloem can be upwards or downwards.
Reason(R): The source will always be leaf and the sink will be other plant parts.
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: Short Distance Transport | Phloem Translocation |
71%
Level 2: 60%+
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Assertion(A): Minerals are absorbed actively.
Reason(R): The concentration of minerals in the soil is usually lower than the concentration of minerals in the root.
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.
Reason(R): The concentration of minerals in the soil is usually lower than the concentration of minerals in the root.
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: Photosynthesis Transpiration Compromise & Mineral Translocation |
78%
Level 2: 60%+
Hints
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.
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%
Level 2: 60%+
Hints
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%
Level 2: 60%+
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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%
Level 2: 60%+
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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%
Level 1: 80%+
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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%
Level 1: 80%+
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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 |
81%
Level 1: 80%+
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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%
Level 1: 80%+
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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%
Level 2: 60%+
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