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NEET • BIOLOGY • TRANSPORT IN PLANTS
Transport in plants practice · Mixed difficulty
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1
Easy
1 of 344
Understanding
+4 | -1
Water rises in the stem due to
View answer and explanation
Correct option: A
Cohension and transpirational pull
Option A (Cohension and transpirational pull) is correct because these forces are responsible for the ascent of water in plants.
2
Hard
2 of 344
Remembering
+4 | -1
Herbaceous plants have only about ____% of its fresh weight as dry matter?
View answer and explanation
Correct option: A
10 – 15
Option A is correct because herbaceous plants typically have a high water content, with only about 10-15% of their fresh weight being dry matter.
3
Medium
3 of 344
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.
4
Easy
4 of 344
Remembering
+4 | -1
Munch hypothesis is based on
View answer and explanation
Correct option: B
Translocation of food due to turgor pressure (TP) gradient
Option B is correct because the Munch hypothesis explains translocation of food through the phloem due to a turgor pressure gradient.
5
Medium
5 of 344
Analyzing
+4 | -1
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.
6
Medium
6 of 344
Remembering
+4 | -1
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.
7
Medium
7 of 344
Remembering
+4 | -1
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.
8
Medium
8 of 344
Remembering
+4 | -1
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.
9
Easy
9 of 344
Remembering
+4 | -1
Active transport
View answer and explanation
Correct option: B
Requires energy
Option B (Requires energy) is correct because active transport moves molecules against their concentration gradient, which requires energy input.
10
Medium
10 of 344
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.
11
Medium
11 of 344
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.
12
Easy
12 of 344
Understanding
+4 | -1
Guard cells control
View answer and explanation
Correct option: C
Closing and opening of stomata
Option C (Closing and opening of stomata) is correct because guard cells are the primary regulators of stomatal aperture.
13
Easy
13 of 344
Understanding
+4 | -1
What is the most efficient region of water absorption in roots?
View answer and explanation
Correct option: D
Zone of differentiation
Option D is correct. The zone of differentiation, also known as the zone of maturation, is the most efficient region of water absorption in roots due to the presence of root hairs.
14
Hard
14 of 344
Understanding
+4 | -1
The path of water from soil upto secondary xylem is
View answer and explanation
Correct option: A
Soil Root hair cell wall Cortex Endodermis Pericycle Protoxylem Metaxylem
Option A (Soil Root hair cell wall Cortex Endodermis Pericycle Protoxylem Metaxylem) is correct because it represents the correct sequence of water movement from the soil to the xylem.
15
Easy
15 of 344
Understanding
+4 | -1
Water moves across a selectively permeable membrane
View answer and explanation
Correct option: A
From - Region of higher
water-potential; to - Region of lower
water potential
water-potential; to - Region of lower
water potential
Option A is correct because water moves from a region of higher water potential to a region of lower water potential due to osmosis.
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16
Easy
16 of 344
Remembering
+4 | -1
Water lost in Guttation is
View answer and explanation
Correct option: B
liquid droplets
Option B (liquid droplets) is correct because guttation is the process where plants release excess water in the form of liquid droplets from their leaves.
17
Medium
17 of 344
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.
18
Medium
18 of 344
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.
19
Medium
19 of 344
Remembering
+4 | -1
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.
20
Medium
20 of 344
Remembering
+4 | -1
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.
21
Medium
21 of 344
Analyzing
+4 | -1
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.
22
Medium
22 of 344
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.
23
Medium
23 of 344
Application
+4 | -1
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.
24
Easy
24 of 344
Understanding
+4 | -1
The rate of diffusion of any substance is not affected by
View answer and explanation
Correct option: B
Presence of other substances in the solution
Option B (Presence of other substances in the solution) is correct because the presence of other substances does not directly affect the diffusion rate of a specific substance.
25
Easy
25 of 344
Understanding
+4 | -1
Movement of molecules takes place along the concentration gradient in
View answer and explanation
Correct option: D
Both 1 and 2
Option D (Both 1 and 2) is correct because both simple and facilitated diffusion involve movement along the concentration gradient.
26
Easy
26 of 344
Understanding
+4 | -1
If flowers are cut and dipped in dilute NaCl solution, then
View answer and explanation
Correct option: B
Endosmosis occurs
Option B (Endosmosis occurs) is correct because a dilute NaCl solution will cause water to move into the flower cells due to osmosis.
27
Medium
27 of 344
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.
28
Easy
28 of 344
Understanding
+4 | -1
Which of the following is always positive
View answer and explanation
Correct option: B
Osmotic pressure
Option B (Osmotic pressure) is correct because osmotic pressure is a colligative property and is always a positive value.
29
Medium
29 of 344
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).
30
Medium
30 of 344
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.
Revision notes and key takeaways
Review TRANSPORT IN PLANTS in your textbook or class notes, then use this set to check your understanding.
Key Takeaways
- ✓ This set contains 344 single-correct-answer MCQs on TRANSPORT IN PLANTS.
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Showing 1-30 of 344 questions