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NEET • BIOLOGY • TRANSPORT IN PLANTS
Transport in plants practice · Easy
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1
Easy
1 of 102
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
Easy
2 of 102
Remembering
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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.
3
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Remembering
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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.
4
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4 of 102
Understanding
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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.
5
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Understanding
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What is the most efficient region of water absorption in roots?
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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.
6
Easy
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Understanding
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Water moves across a selectively permeable membrane
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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.
7
Easy
7 of 102
Remembering
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Water lost in Guttation is
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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.
8
Easy
8 of 102
Understanding
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The rate of diffusion of any substance is not affected by
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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.
9
Easy
9 of 102
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.
10
Easy
10 of 102
Understanding
+4 | -1
If flowers are cut and dipped in dilute NaCl solution, then
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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.
11
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Understanding
+4 | -1
Which of the following is always positive
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Correct option: B
Osmotic pressure
Option B (Osmotic pressure) is correct because osmotic pressure is a colligative property and is always a positive value.
12
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Understanding
+4 | -1
If a stem is girdled
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Correct option: A
Root dies first
Option A (Root dies first) is correct because girdling removes the phloem, which transports sugars from the leaves to the roots. Without sugar, the roots cannot survive, leading to their death first.
13
Easy
13 of 102
Remembering
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Stomatal opening is affected by
View answer and explanation
Correct option: B
Carbon dioxide concentration, temperature and light
Option B is correct. Stomatal opening is affected by carbon dioxide concentration, temperature, and light.
14
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Understanding
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Which of the following has maximum water potential?
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Correct option: A
Pure water
Option A (Pure water) is correct because pure water has the highest water potential, defined as zero under standard conditions.
15
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Understanding
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Which among the following has highest water potential?
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Correct option: C
Distilled water
Option C (Distilled water) is correct because distilled water has the highest water potential, defined as zero under standard conditions.
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16
Easy
16 of 102
Remembering
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Phloem sap is made up of
View answer and explanation
Correct option: B
Water and sucrose
Option B (Water and sucrose) is correct because phloem sap primarily consists of water and sucrose, which is the main sugar transported in plants.
17
Easy
17 of 102
Understanding
+4 | -1
Stomata open and close due to
View answer and explanation
Correct option: D
All of these
Option D (All of these) is correct because turgor pressure, hormonal changes, and temperature all influence stomatal movement.
18
Easy
18 of 102
Remembering
+4 | -1
The water potential and osmotic potential of pure water is
View answer and explanation
Correct option: A
Zero and zero
Option A (Zero and zero) is correct because pure water has no solutes and is at atmospheric pressure, making both its water potential and osmotic potential zero.
19
Easy
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Understanding
+4 | -1
During osmosis, water moves through a membrane
View answer and explanation
Correct option: D
From : A hypotonic solution (less solute) , To : A hypertonic solution (more solute)
Option D (From : A hypotonic solution (less solute) , To : A hypertonic solution (more solute)) is correct because water moves from a hypotonic solution (lower solute concentration, higher water potential) to a hypertonic solution (higher solute concentration, lower water potential).
20
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20 of 102
Remembering
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Transport of different types of solute substances takes place by
View answer and explanation
Correct option: A
Bulk flow system
Option A is correct because the bulk flow system is responsible for the transport of different types of solute substances in plants.
21
Easy
21 of 102
Understanding
+4 | -1
Movement and accumulation of ions across a membrane against their concentration gradient can be
explained by
explained by
View answer and explanation
Correct option: B
Active Transport
Option B is correct. Active transport is the movement and accumulation of ions across a membrane against their concentration gradient, requiring energy.
22
Easy
22 of 102
Understanding
+4 | -1
Passive absorption of mineral salts is not dependent on
View answer and explanation
Correct option: B
Osmosis
Option B (Osmosis) is correct because passive absorption of mineral salts relies on diffusion, Donnan equilibrium, and ionic exchange, but not directly on osmosis, which is water movement.
23
Easy
23 of 102
Remembering
+4 | -1
The shape of guard cells in stomata in sugarcane plant is
View answer and explanation
Correct option: A
Dumb bell-shaped
Option A (Dumb bell-shaped) is correct because guard cells in stomata of sugarcane (a monocot) are typically dumbbell-shaped, unlike the bean-shaped guard cells found in dicots.
24
Easy
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Analyzing
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In thistle funnel experiment, what will occur if sugar solution is added to beaker, after the process of osmosis stops?
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Correct option: B
The level of solution in thistle funnel lowers
Option B (The level of solution in thistle funnel lowers) is correct because adding sugar to the beaker increases the solute concentration outside, reversing the osmotic gradient and causing water to move out of the funnel.
25
Easy
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Remembering
+4 | -1
Mycorrhiza mainly helps in absorption of
View answer and explanation
Correct option: A
Phosphorous
Option A (Phosphorous) is correct because mycorrhizae, a symbiotic association between fungi and plant roots, significantly enhance the absorption of phosphorus from the soil.
26
Easy
26 of 102
Understanding
+4 | -1
What will be the affect of accumulation of potassium ions in guard cells?
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Correct option: D
Decrease in water potential
Option D (Decrease in water potential) is correct because the accumulation of solutes decreases the water potential of the guard cells.
27
Easy
27 of 102
Understanding
+4 | -1
Wooden doors and logs swells up, and get stuck up during rainy season due to
View answer and explanation
Correct option: A
Imbibition
Option A (Imbibition) is correct because imbibition is the process by which solid substances absorb water, causing them to swell, which explains the swelling of wooden doors during the rainy season.
28
Easy
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Understanding
+4 | -1
If the osmotic pressure of cytoplasm in a cell is balanced by external solution, the solution must be
View answer and explanation
Correct option: D
Isotonic
Option D (Isotonic) is correct because an isotonic solution has the same osmotic pressure as the cytoplasm, resulting in no net movement of water.
29
Easy
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Understanding
+4 | -1
What happens when concentration of solutes decreases in guard cells?
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Correct option: A
Water potential increases
Option A (Water potential increases) is correct because a decrease in solute concentration raises the water potential.
30
Easy
30 of 102
Understanding
+4 | -1
Which one of the following is part of symplast?
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Correct option: D
All of these
Option D (All of these) is correct because the symplast includes the cytoplasm, protoplast, and plasmodesmata, all interconnected living components of plant cells.
Revision notes and key takeaways
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Key Takeaways
- ✓ This set contains 102 single-correct-answer MCQs on TRANSPORT IN PLANTS.
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Showing 1-30 of 102 questions