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Q. No.
Assertion(A): Most of the water flow in the roots occurs via the apoplast.
Reason(R): The packing of cortical cells offers no resistance to water movement.
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: Water Absorption |
72%
Level 2: 60%+
Hints
Assertion(A): There is pulling of water, molecule by molecule, into the leaf from the xylem.
Reason(R): Evaporation of water through stomata facilitates the movement of water against gravity.
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): Evaporation of water through stomata facilitates the movement of water against gravity.
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: Transpiration & Guttation |
Level 3: 35%-60%
Hints
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.
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%+
Hints
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%+
Please attempt this question first.
Hints
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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%+
Please attempt this question first.
Hints
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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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