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Q. No.Identify the correct statements regarding Mass flow hypothesis.
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.
Choose the correct answer from the options given below:
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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During symport, two different molecules move across the membrane:
| 1. | in same direction with the help of different carriers located at a common site |
| 2. | in same direction with the help of different carriers located at different sites in the same cell |
| 3. | in same direction with the help of same carrier |
| 4. | in opposite direction with the help of same carrier |
Subtopic: Means of Transport: Passive |
55%
From NCERT
NEET - 2023
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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 correct but Statement II is correct
2. Statement I is incorrect but Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect
| I: | The process of translocation through phloem is unidirectional but through xylem, it is bidirectional |
| II: | The most readily mobilized elements are phosphorus, sulphur, nitrogen and potassium. |
1. Statement I is correct but Statement II is correct
2. Statement I is incorrect but Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect
Subtopic: Phloem Translocation | Photosynthesis Transpiration Compromise & Mineral Translocation |
57%
From NCERT
NEET - 2023
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Given below are two statements:
| Assertion (A): | Transport in xylem and phloem is unidirectional and multidirectional, respectively. |
| Reason (R): | In a flowering plant there is complex traffic of compounds moving in different directions. |
| 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: Phloem Translocation |
60%
From NCERT
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Given below are two statements:
| Assertion (A): | It is the only means for gaseous movement within the plant body. |
| Reason (R): | Diffusion is very important to plants. |
| 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: Diffusion |
55%
From NCERT
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Given below are two statements:
| Assertion (A): | Water is often the limiting factor for plant growth and productivity. |
| Reason (R): | Plants have low demand of water. |
| 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: Plant Water Relations: Water Potential: 2 |
79%
From NCERT
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Given below are two statements:
| Assertion (A): | Pure water has maximum water potential. |
| Reason (R): | The greater the concentration of water in a system, the greater is its water potential. |
| 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: Plant Water Relations: Water Potential: DPD |
66%
From NCERT
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Given below are two statements:
| Assertion (A): | All solutions have a lower water potential than pure water. |
| Reason (R): | The concentration of water in a solution is less than pure water. |
| 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: Water Potential Concept |
77%
From NCERT
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Given below are two statements:
| Assertion (A): | Cell wall is not barrier to movement of small molecules. |
| Reason (R): | Cell wall is freely permeable to water and other substances in a solution. |
| 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: Osmosis |
78%
From NCERT
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Given below are two statements:
| Assertion (A): | Plant cell does not rupture in a hypotonic solution. |
| Reason (R): | Plant cell is surrounded by a rigid cell wall. |
| 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: Plasmolysis |
80%
From NCERT
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