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Q. No.Translocation of photosynthetic end products in seive tubes is
(1) 3-5 mm/h
(2) 3-5 cm/h
(3) 1-15 cm/h
(4) 60-100 cm/h
Subtopic: Â Phloem Translocation: Short Distance Transport |Â Phloem Translocation |
AIIMS - 2011
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Girdling experiment suggests that
(1) Xylem is for water and mineral transport
(2) Phloem is for translocation of food
(3) Transport in phloem is multi directional as well
(4) The portion below the ring becomes swollen due to water
Subtopic: Â Phloem Translocation: Short Distance Transport |
 72%
From NCERT
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First sugar moves to
(At the time of loading of phloem)
(1) Companion cells
(2) Sieve tube cells
(3) Xylem vessels
(4) Phloem fiber
Subtopic: Â Phloem Translocation: Short Distance Transport |
 71%
From NCERT
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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What would be incorrect for phloem in angiosperms?
1. Phloem fibres, at maturity, lose their protoplasm and become dead.
2. The function of sieve tubes is controlled by the nucleus of companion cell.
3. The direction of movement in the phloem can be bi-directional.
4. Phloem sap is mainly water and starch.
1. Phloem fibres, at maturity, lose their protoplasm and become dead.
2. The function of sieve tubes is controlled by the nucleus of companion cell.
3. The direction of movement in the phloem can be bi-directional.
4. Phloem sap is mainly water and starch.
Subtopic: Â Phloem Translocation: Short Distance Transport |Â Phloem Translocation |
 70%
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: Â Phloem Translocation: Short Distance Transport |Â Phloem Translocation |
 76%
From NCERT
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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: Â Phloem Translocation: Short Distance Transport |Â Phloem Translocation |
 71%
From NCERT
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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: Â Phloem Translocation: Short Distance Transport |Â Phloem Translocation |
 70%
From NCERT
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