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NEET • BIOLOGY • TRANSPORT IN PLANTS
Transport in plants practice · Easy
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61
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Remembering
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A special type, which occurs when water is absorbed by solids causing them to increase in volume is called
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Correct option: C
Imbibition
Option C (Imbibition) is correct because imbibition is the process where solids absorb water, causing them to swell without forming a solution.
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Understanding
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When pea seeds and wheat grains are soaked in water, pea seeds showed more swelling than the wheat. The reason is
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Correct option: A
Imbibitions capacity of proteins is more than that of starch
Option A (Imbibitions capacity of proteins is more than that of starch) is correct because pea seeds have a higher protein content, and proteins have a greater imbibition capacity compared to starch, which is the main component of wheat grains.
63
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Understanding
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Which among the following is NOT by facilitated diffusion?
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Correct option: D
Conduction of water, minerals and organic solutes in xylem and phloem.
Option D (Conduction of water, minerals and organic solutes in xylem and phloem) is correct because this process involves bulk flow, which is different from facilitated diffusion.
64
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Remembering
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The stomata in CAM plants open during
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Correct option: B
Night
Option B (Night) is correct because CAM plants open their stomata at night to fix carbon dioxide, minimizing water loss during the hotter, drier daytime hours.
65
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Remembering
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Transport of water and minerals in xylem is essentially
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Correct option: C
Unidirectional
Option C (Unidirectional) is correct because water and minerals are transported upwards from the roots to the leaves in the xylem.
66
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Analyzing
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Some cells are placed in a solution of glucose to measure the rate of diffusion. As the concentration of glucose solution is being increased, the diffusion rate increases simultaneously. However, when the concentration of glucose solution reaches above 10 m, the diffusion rate no longer increases
Which statement best define the mechanism of glucoses transport in the cells?
Which statement best define the mechanism of glucoses transport in the cells?
View answer and explanation
Correct option: A
Transport of hydrophilic substances along the concentration gradient through fixed membrane transport protein without the involvement of energy expenditure
Option A (Transport of hydrophilic substances along the concentration gradient through fixed membrane transport protein without the involvement of energy expenditure) is correct because the diffusion rate plateaus above a certain glucose concentration, indicating saturation of transport proteins without energy use.
67
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Remembering
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Force behind guttation
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Correct option: B
Root pressure
Option B (Root pressure) is correct because root pressure is the force behind guttation, pushing water out of the plant through hydathodes.
68
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Understanding
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If solute particles are added in pure water, its diffusion pressure will be
View answer and explanation
Correct option: B
Decreased
Option B (Decreased) is correct because adding solute particles to pure water lowers its water potential and thus decreases its diffusion pressure.
69
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Remembering
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The turgidity of guard cells is maintained by
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Correct option: A
OP
Option A (OP) is correct because the turgidity of guard cells is maintained by the osmotic potential (OP), which determines the water potential gradient and thus water movement into the cells.
70
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Remembering
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Ascent of sap is
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Correct option: B
Passive, and no requirement of energy by the plants
Option B (Passive, and no requirement of energy by the plants) is correct because the ascent of sap primarily relies on physical forces like transpiration pull and cohesion, not active transport.
71
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Remembering
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Term osmosis is specifically used to refer
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Correct option: A
Diffusion across the semipermeable membrane
Option A (Diffusion across the semipermeable membrane) is correct because osmosis is specifically defined as the movement of water across a semipermeable membrane from a region of high water potential to a region of low water potential.
72
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Understanding
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Among the following seeds and grains, which have more imbibing capacity?
I. Sorghum II. Cicer III. Pisum IV. Cajanus V. Paddy
I. Sorghum II. Cicer III. Pisum IV. Cajanus V. Paddy
View answer and explanation
Correct option: C
II, III, IV
Option C (II, III, IV) is correct because Cicer (chickpea), Pisum (pea), and Cajanus (pigeon pea) are legumes, which generally have higher protein content and thus greater imbibition capacity compared to grains like Sorghum and Paddy.
73
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Remembering
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Guttation is mainly due to
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Correct option: A
Root pressure
Option A (Root pressure) is correct because guttation is primarily caused by root pressure pushing water out of the plant.
74
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Understanding
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Diffusion rates are affected by
I) Concentration gradient II) Temperature III) Pressure IV) Size of the substances
I) Concentration gradient II) Temperature III) Pressure IV) Size of the substances
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Correct option: D
All except III
Option D (All except III) is correct because concentration gradient, temperature, and size of substances affect diffusion rates, while pressure does not directly affect diffusion.
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Remembering
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Carrier protein, which allows the movement of molecules in opposite direction is
View answer and explanation
Correct option: A
Antiport
Option A is correct because an antiport carrier protein facilitates the movement of two different molecules across a membrane in opposite directions.
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Understanding
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Facilitated diffusion does not require/show
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Correct option: C
ATP energy
Option C (ATP energy) is correct because facilitated diffusion is a type of passive transport that does not require ATP energy.
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Understanding
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Facilitated diffusion
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Correct option: A
Needs a carrier protein
Option A (Needs a carrier protein) is correct because facilitated diffusion requires a carrier protein to assist in the transport of molecules across the membrane.
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Remembering
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What is the approximate dry weight contained by majority of herbaceous plants?
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Correct option: C
About 10-15% of fresh weight
Option C is correct because herbaceous plants typically contain about 10-15% of their fresh weight as dry weight, the rest being water.
79
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Understanding
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Through which process, starch of the guard cell is converted into PEP ions?
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Correct option: C
Hydrolysis
Option C (Hydrolysis) is correct because hydrolysis breaks down starch into simpler sugars, which are then converted into PEP ions through glycolysis.
80
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Understanding
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Select the incorrect statement w.r.t. apoplast pathway of absorption of water in plants.
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Correct option: A
It consists of living parts of plant body
Option A (It consists of living parts of plant body) is correct because the apoplast pathway consists of non-living parts of the plant body, such as cell walls and intercellular spaces.
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Remembering
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Water potential of pure water at standard temperatures, which is not under any pressure is
View answer and explanation
Correct option: B
Equal to zero
Option B (Equal to zero) is correct because pure water at standard temperature and not under pressure has a water potential defined as zero.
82
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Understanding
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Root cell in which the movement is always symplastic is
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Correct option: C
Endodermal cell
Option C (Endodermal cell) is correct because the endodermal cells have casparian strips that force water to move symplastically.
83
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Understanding
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Sinks are related to
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Correct option: A
Transport of solutes
Option A (Transport of solutes) is correct because sinks in plants are areas where solutes, such as sugars, are unloaded and utilized or stored.
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Application
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RBC and a plant cell (with thick cell wall) are placed in distilled water. The solute concentration is the same in both the cells. What changes would be observed in them?
View answer and explanation
Correct option: B
The RBC would increase in size and burst, while the plant cell would remain about the same size
Option B (The RBC would increase in size and burst, while the plant cell would remain about the same size) is correct because the RBC lacks a cell wall and will burst due to osmosis, while the plant cell's cell wall provides structural support.
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Understanding
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Regarding root pressure, which one is not correct?
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Correct option: D
It is not able to push water up to small height in the stem
Option A (It is sufficient to rise water above ground level) is not correct because root pressure alone is not sufficient to raise water to great heights in tall trees.
86
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Remembering
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Which of the given experiment proved that food is translocated via phloem?
View answer and explanation
Correct option: A
Girdling experiment
Option A is correct because the girdling experiment demonstrates that food is translocated via the phloem, as removing the bark (containing the phloem) disrupts downward transport.
87
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Remembering
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The pressure exerted by the protoplast due to the entry of water against the rigid cell wall is termed as
View answer and explanation
Correct option: A
Turgor pressure
Option A (Turgor pressure) is correct because turgor pressure is the pressure exerted by the protoplast against the cell wall due to the entry of water.
88
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Understanding
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If two molecules A & B move in the same direction. This movement can be called
View answer and explanation
Correct option: B
Symport
Option B (Symport) is correct because symport refers to the simultaneous movement of two molecules across a membrane in the same direction.
89
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89 of 102
Remembering
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Water composition in a water-melon is approximately
View answer and explanation
Correct option: D
0.92
Option D is correct because the water composition in a watermelon is approximately 92%, making it a highly hydrated fruit.
90
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Understanding
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Which of the following affect the transport of molecules when carrier mediated facilitated diffusion is involved?
View answer and explanation
Correct option: D
All of the above
Option D (All of the above) is correct because the solubility of the molecule in lipids, the concentration gradient, and the availability of the carrier molecule all affect the rate of facilitated diffusion.
Revision notes and key takeaways
Review TRANSPORT IN PLANTS in your textbook or class notes, then use this set to check your understanding.
Showing 61-90 of 102 questions