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NEET • BIOLOGY • TRANSPORT IN PLANTS
Transport in plants practice · Medium
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1
Medium
1 of 205
Understanding
+4 | -1
Wilting occurs when
View answer and explanation
Correct option: A
Rate of transpiration is higher than absorption
Option A is correct because wilting occurs when the rate of water loss through transpiration exceeds the rate of water absorption by the roots.
2
Medium
2 of 205
Analyzing
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Study the following statement and choose the correct option(s) from the codes from below
I. Root pressure provides a light push in the overall process of water transport
II. Root pressure causes the flow of water faster through xylem than it can be lost by transportation
III. In symplast pathway, water move exclusively through the cell wall and intercellular spaces
IV. Guttation is a cause of transpiration pull
V. Most plants fulfill their water requirement by transpiration pull
I. Root pressure provides a light push in the overall process of water transport
II. Root pressure causes the flow of water faster through xylem than it can be lost by transportation
III. In symplast pathway, water move exclusively through the cell wall and intercellular spaces
IV. Guttation is a cause of transpiration pull
V. Most plants fulfill their water requirement by transpiration pull
View answer and explanation
Correct option: C
I and V are correct
Option C (I and V are correct) is correct because root pressure provides a light push in water transport, and most plants rely on transpiration pull for their water requirements.
3
Medium
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Remembering
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Rate of imbibition is more in?
View answer and explanation
Correct option: A
Protein
Option A (Protein) is correct because proteins have a higher affinity for water due to their polar amino acid side chains, leading to a higher rate of imbibition.
4
Medium
4 of 205
Remembering
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All the water absorbed by osmosis is stored in?
View answer and explanation
Correct option: A
Vacuole
Option A (Vacuole) is correct because the vacuole is the primary storage organelle for water and other substances in plant cells.
5
Medium
5 of 205
Remembering
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The process in which water moves out of the cell and the cell membrane of a plant cell shrinks away from its cell wall is known as
View answer and explanation
Correct option: C
Plasmolysis
Option C (Plasmolysis) is correct because it specifically describes the shrinking of the plant cell membrane away from the cell wall due to water loss.
6
Medium
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Understanding
+4 | -1
The following is to be transported in flowering plants in unidirectional manner from root to shoot?
View answer and explanation
Correct option: D
1 and 2
Option D (1 and 2) is correct because water and minerals are transported unidirectionally from root to shoot via the xylem.
7
Medium
7 of 205
Remembering
+4 | -1
The process of absorption of water by hydrophilic solid particles of a substance without forming a solution is called
View answer and explanation
Correct option: B
Imbibition
Option B (Imbibition) is correct because imbibition is the absorption of water by hydrophilic substances without forming a solution.
8
Medium
8 of 205
Remembering
+4 | -1
The process of water exudation through hydathodes is called?
View answer and explanation
Correct option: C
Guttation
Option C (Guttation) is correct because guttation is the process of water exudation through hydathodes.
9
Medium
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Understanding
+4 | -1
Choose odd one out w.r.t. facilitated diffusion.
View answer and explanation
Correct option: B
Uphill and needs ATP
Option B (Uphill and needs ATP) is correct because facilitated diffusion is a passive process and does not require ATP or move molecules uphill against their concentration gradient.
10
Medium
10 of 205
Remembering
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A thin film of water is held by the soil particles under the influence of internal attractive force. It is called
View answer and explanation
Correct option: A
Hygroscopic water
Option A is correct. Hygroscopic water is held tightly by soil particles due to internal attractive forces.
11
Medium
11 of 205
Remembering
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The value of pure water potential is
View answer and explanation
Correct option: C
Always zero
Option C is correct because the water potential of pure water is defined as zero under standard conditions.
12
Medium
12 of 205
Analyzing
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A group of students are studying transport of certain type of molecules in a cells and observe that transport slows down when the cells are treated with poison, a chemical, which inhibit energy production. Under normal conditions, the molecules are being studied and it is estimated that molecules probably transported by
View answer and explanation
Correct option: B
Process of active transport
Option B (Process of active transport) is correct because active transport requires energy to move molecules against their concentration gradient, and inhibiting energy production slows down this process.
13
Medium
13 of 205
Understanding
+4 | -1
If you are given a task to analyse phloem sap chemical, which of the following will be present in least concentration?
View answer and explanation
Correct option: C
Minerals and nitrogen
Option C (Minerals and nitrogen) is correct because phloem sap is primarily composed of water and sugars, with minerals and nitrogen present in much lower concentrations.
14
Medium
14 of 205
Application
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If the pressure potential is +0.16 megapascals (mPa) and the osmotic potential is -0.24 megapascals, then the water potential would be
View answer and explanation
Correct option: C
-0.08 mPa
Option C (-0.08 mPa) is correct because water potential is the sum of the pressure potential and the osmotic potential.
15
Medium
15 of 205
Understanding
+4 | -1
Identify the incorrect one for root pressure.
View answer and explanation
Correct option: B
Develop due to passive absorption of water
Option B (Develop due to passive absorption of water) is correct because root pressure develops due to active absorption of ions, not passive absorption of water.
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16
Medium
16 of 205
Application
+4 | -1
If cell A with OP = 5 and TP = 4 is surrounded by cells
with OP = 3 and TP = 1, what will be the direction of water
movement
with OP = 3 and TP = 1, what will be the direction of water
movement
View answer and explanation
Correct option: A
From cell A to other cells
Option A (From cell A to other cells) is correct because water moves from a higher water potential to a lower water potential. Cell A has a water potential of -1 (5-4), while the surrounding cells have a water potential of -2 (3-1).
17
Medium
17 of 205
Analyzing
+4 | -1
Study the following and identify the mismatch
View answer and explanation
Correct option: A
Simple diffusion – Transport saturates
Option A (Simple diffusion – Transport saturates) is correct because simple diffusion does not saturate, while facilitated and active transport do saturate.
18
Medium
18 of 205
Understanding
+4 | -1
In plants, long distance transport of organic and inorganic substances occur through
View answer and explanation
Correct option: B
Complex permanent tissues
Option B (Complex permanent tissues) is correct because xylem and phloem, the complex permanent tissues, are responsible for long-distance transport.
19
Medium
19 of 205
Remembering
+4 | -1
Cohesion force, a feature of cohesion theory is also called
View answer and explanation
Correct option: A
Tensile a strength
Option A is correct. Cohesion force, a feature of the cohesion theory, is also called tensile strength.
20
Medium
20 of 205
Remembering
+4 | -1
The evaporative loss of water from the exposed part of plant is called
View answer and explanation
Correct option: A
Transpiration
Option A (Transpiration) is correct because it is the process of water evaporation from plant surfaces.
21
Medium
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Application
+4 | -1
Two cells A and B are contiguous. Cell-A has osmotic pressure-10 atm, turgor pressure-7 atm and diffusion pressure deficit-3 atm.
Cell-B has osmotic pressure-8 atm, turgor pressure-3 atm and diffusion pressure deficit 5 atm. The result will be
Cell-B has osmotic pressure-8 atm, turgor pressure-3 atm and diffusion pressure deficit 5 atm. The result will be
View answer and explanation
Correct option: D
Movement of water from cell-A to B
Option D (Movement of water from cell-A to B) is correct because water moves from a region of lower diffusion pressure deficit (DPD) to a region of higher DPD.
22
Medium
22 of 205
Remembering
+4 | -1
The seeds cannot germinate without the presence of mycorrhizae in?
View answer and explanation
Correct option: A
Pinus
Option A (Pinus) is correct because Pinus seeds often require the presence of mycorrhizae, a symbiotic association between fungi and plant roots, for successful germination and seedling establishment.
23
Medium
23 of 205
Remembering
+4 | -1
Which of the following statement is correct?
View answer and explanation
Correct option: A
DPD=OP-WP
Option A (DPD=OP-WP) is correct because Diffusion Pressure Deficit (DPD) is defined as the difference between Osmotic Pressure (OP) and Wall Pressure (WP) or Turgor Pressure (TP).
24
Medium
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Remembering
+4 | -1
The sugarcane plant has
View answer and explanation
Correct option: A
Dumb bell-shaped guard cells
Option A (Dumb bell-shaped guard cells) is correct because sugarcane, being a monocot, has guard cells of this shape.
25
Medium
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Analyzing
+4 | -1
Assertion: Unidirectional flow of water, mineral
and nitrogen occurs through xylem.
Reason: Direction of flow of organic and
inorganic substances is unidirectional and
occurs through phloem.
and nitrogen occurs through xylem.
Reason: Direction of flow of organic and
inorganic substances is unidirectional and
occurs through phloem.
View answer and explanation
Correct option: C
If Assertion is true but Reason is false
Option C (If Assertion is true but Reason is false) is correct because water, minerals, and nitrogen flow unidirectionally through xylem, but the flow of organic and inorganic substances through phloem can be bidirectional.
26
Medium
26 of 205
Understanding
+4 | -1
Find the false statement.
View answer and explanation
Correct option: B
In a plasmolysed cell OP = TP
Option B (In a plasmolysed cell OP = TP) is false because in a plasmolysed cell, turgor pressure is zero, and osmotic pressure is not equal to it.
27
Medium
27 of 205
Remembering
+4 | -1
A transport which uses energy to pump molecules against a concentration gradient is known as
View answer and explanation
Correct option: C
Active transport
Option C (Active transport) is correct because it is the only transport mechanism that requires energy to move molecules against their concentration gradient.
28
Medium
28 of 205
Remembering
+4 | -1
Hydathodes are also called
View answer and explanation
Correct option: A
Water stomata
Option A (Water stomata) is correct because hydathodes are also known as water stomata, as they release water in liquid form.
29
Medium
29 of 205
Understanding
+4 | -1
pumps are helpful in?
View answer and explanation
Correct option: B
Uniport
Option B (Uniport) is correct because H+ pumps facilitate the movement of a single type of molecule across the membrane in one direction, which is the definition of uniport.
30
Medium
30 of 205
Understanding
+4 | -1
Mycorrhiza, a mutal relationship between fungus and a root of gymnosperm helps in
I. absorption of water
II. mineral absorption
III. translocation
IV. gaseous exchange Choose the correct option
I. absorption of water
II. mineral absorption
III. translocation
IV. gaseous exchange Choose the correct option
View answer and explanation
Correct option: B
II and I
Option B is correct. Mycorrhizae help in the absorption of water and minerals, so I and II are correct.
Revision notes and key takeaways
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Key Takeaways
- ✓ This set contains 205 single-correct-answer MCQs on TRANSPORT IN PLANTS.
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Showing 1-30 of 205 questions