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NEET • BIOLOGY • TRANSPORT IN PLANTS
Transport in plants practice · Medium
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91
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Understanding
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Transpiration facilitates
View answer and explanation
Correct option: C
Absorption of water by roots
Option C (Absorption of water by roots) is correct because transpiration creates a pulling force that aids in the upward movement of water, facilitating water absorption by the roots to replace the lost water.
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Remembering
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One factor responsible for water rise up to 100 m of tall plant, is
View answer and explanation
Correct option: B
Transpiration pull
Option B (Transpiration pull) is correct because transpiration pull, generated by the evaporation of water from leaves, creates a tension that pulls water up the xylem.
93
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Remembering
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Carrier protein, which allows the diffusion of two type of molecules in the same direction is
View answer and explanation
Correct option: A
Symport
Option A (Symport) is correct because symport carrier proteins transport two different molecules across the membrane in the same direction.
94
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Understanding
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If water potential of cell A,B and C are -2,-4 and -6 respectively then the water will move from
View answer and explanation
Correct option: A
Option A () is correct because water moves from areas of higher water potential to areas of lower water potential, and A (-2) > B (-4) > C (-6).
95
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Understanding
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Plants develops force for upward conduction of water against gravity is derived from
View answer and explanation
Correct option: B
Transpiration
Option B (Transpiration) is correct because transpiration creates a pull that helps in the upward conduction of water.
96
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Remembering
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Which one of the following is a rapid type of water absorption?
View answer and explanation
Correct option: A
Passive
Option A (Passive) is correct because passive water absorption occurs along a water potential gradient and does not require the plant to expend metabolic energy, making it a rapid process.
97
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Remembering
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According to the transpiration-cohesion theory, the upward pull of water is transmitted to other water molecules by cohesion, which is caused by
View answer and explanation
Correct option: A
Hydrogen bond
Option A is correct. According to the transpiration-cohesion theory, the upward pull of water is transmitted to other water molecules by cohesion, which is caused by hydrogen bonds.
98
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Remembering
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The plants, which are able to send their roots up to the fringe of water table are called
View answer and explanation
Correct option: C
Phreatophytes
Option C (Phreatophytes) is correct because phreatophytes are plants with roots that reach the water table.
99
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Analyzing
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Which of the following statements is/are not true?
I.In CAM plants, stomata open during dark and remain closed during the day. II.Role of in stomatal opening is now universally accepted.
III.The water potential of root cells is higher than the water potential of soil. IV.Capillarity theory is the most accepted theory of water movement through plants. V.The walls of xylem vessels made up of lingo-cellulose have strong affinity for water molecules.
I.In CAM plants, stomata open during dark and remain closed during the day. II.Role of in stomatal opening is now universally accepted.
III.The water potential of root cells is higher than the water potential of soil. IV.Capillarity theory is the most accepted theory of water movement through plants. V.The walls of xylem vessels made up of lingo-cellulose have strong affinity for water molecules.
View answer and explanation
Correct option: B
II, III and IV
Option B (II, III and IV) is correct because the role of K+ in stomatal opening is well-accepted, the water potential of root cells is lower than the soil, and the cohesion-tension theory is the most accepted theory of water movement.
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Understanding
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If turgidity of a cell surrounded by water increases, the wall pressure will
View answer and explanation
Correct option: A
Increase
Option A (Increase) is correct because as turgidity increases, the cell's contents push more forcefully against the cell wall, increasing wall pressure.
101
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Analyzing
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Select the odd one w.r.t external factors affecting the transpiration.
View answer and explanation
Correct option: B
Canopy structure
Option B (Canopy structure) is correct because canopy structure is an internal plant factor, while temperature, light, and humidity are external environmental factors affecting transpiration.
102
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Understanding
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How translocation of organic material is explained in plants?
View answer and explanation
Correct option: C
Mass flow hypothesis
Option C (Mass flow hypothesis) is correct because it explains the translocation of organic material in plants from source to sink through phloem.
103
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Understanding
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Movement of molecules in three forms of matter, from a region higher concentration to a region of lower concentration can be termed as
View answer and explanation
Correct option: C
Diffusion
Option C (Diffusion) is correct because diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration in all three states of matter.
104
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Understanding
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Which statement can be shared by facilitated diffusion and active transport?
View answer and explanation
Correct option: A
Both need carrier transporter, which are sensitive to inhibitors that reacts with protein side chains
Option A (Both need carrier transporter, which are sensitive to inhibitors that reacts with protein side chains) is correct because both facilitated diffusion and active transport utilize carrier proteins that can be inhibited.
105
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Understanding
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Osmosis involves flow of
View answer and explanation
Correct option: C
Solvent through a semi-permeable membrane
Option C (Solvent through a semi-permeable membrane) is correct because osmosis is defined as the movement of solvent (typically water) through a semi-permeable membrane from a region of high water potential to a region of low water potential.
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106
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Understanding
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Which one of the following is the reason for higher rate of transpiration in Sorghum as compared to maize?
View answer and explanation
Correct option: A
Increased shoot/root ratio
Option A (Increased shoot/root ratio) is correct because a higher shoot/root ratio in Sorghum means more transpiring surface area relative to water uptake capacity.
107
Medium
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Analyzing
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Consider the following statements and choose the correct answer
I. Carrier proteins are needed by both facilitated diffusion and active transport and are sensitive to inhibitors that react with protein side chain
II. Different types of proteins present in the membrane plays a major role in both active as well as passive transport
III. The carrier proteins needed by facilitated and active transport are specific
IV. There is no need of energy to pump molecule against a concentration in active transport
V. Transport rate reaches to saturation point, when all the active proteins are used
I. Carrier proteins are needed by both facilitated diffusion and active transport and are sensitive to inhibitors that react with protein side chain
II. Different types of proteins present in the membrane plays a major role in both active as well as passive transport
III. The carrier proteins needed by facilitated and active transport are specific
IV. There is no need of energy to pump molecule against a concentration in active transport
V. Transport rate reaches to saturation point, when all the active proteins are used
View answer and explanation
Correct option: D
I, II, III and V
Option D (I, II, III and V) is correct because these statements accurately describe carrier proteins, membrane proteins, and the saturation of transport.
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Understanding
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Read carefully the following statements and choose the right answer from the options given below
I. Diffusion is a slow process and it do not depends upon the living system
II. Usually process of diffusion does not need energy
III. Diffusion can occur from one part of a cell to another part of the same cell or from one cell to another and from one tissue to another tissue
IV. Diffusion is a rapid process over short distance, but extremely slow over long distances
I. Diffusion is a slow process and it do not depends upon the living system
II. Usually process of diffusion does not need energy
III. Diffusion can occur from one part of a cell to another part of the same cell or from one cell to another and from one tissue to another tissue
IV. Diffusion is a rapid process over short distance, but extremely slow over long distances
View answer and explanation
Correct option: D
I, II, III and IV
Option D (I, II, III and IV) is correct because all the statements about diffusion are accurate.
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Remembering
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Movement among cells against concentration gradient is called
View answer and explanation
Correct option: B
Active transport
Option B is correct because active transport is the movement of molecules across a cell membrane against their concentration gradient, requiring energy.
110
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Remembering
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How much percentage of absorbed water in plants is used in the process of photosynthesis?
View answer and explanation
Correct option: D
1-2% of absorbed water
Option D (1-2% of absorbed water) is correct because plants use a very small percentage of the water they absorb for photosynthesis, with the majority being lost through transpiration.
111
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Understanding
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Study the following statements
I. Most minerals must enter the roots by active absorption into cytoplasm and epidermal cells
II. Ions are absorbed by both passive and active transport
III. Active absorption does not require energy
IV. Active uptake of ions is responsible for osmosis
Choose the correct option in reference to the statements given above
I. Most minerals must enter the roots by active absorption into cytoplasm and epidermal cells
II. Ions are absorbed by both passive and active transport
III. Active absorption does not require energy
IV. Active uptake of ions is responsible for osmosis
Choose the correct option in reference to the statements given above
View answer and explanation
Correct option: B
I, II and IV are correct and III is incorrect
Option A (I and II are correct and III and IV are incorrect) is correct because minerals enter roots by active absorption, ions are absorbed by both passive and active transport, active absorption requires energy, and active uptake of ions does not directly cause osmosis.
112
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Remembering
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Pumps are
View answer and explanation
Correct option: D
Proteins
Option D (Proteins) is correct because pumps, which facilitate active transport, are typically made of proteins.
113
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Understanding
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During ionic influx, uptake of ions into the inner space is:
View answer and explanation
Correct option: A
Slowely and active process
Option A is correct. During ionic influx, the uptake of ions into the inner space is a slow and active process, requiring energy to move ions against their concentration gradient.
114
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Remembering
+4 | -1
Which one of the following is not an antitranspirant?
View answer and explanation
Correct option: B
BAP
Option B is correct. BAP (Benzylaminopurine) is a cytokinin, which promotes cell division and is not an antitranspirant.
115
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Understanding
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A student has taken a twig from a plant. She/he observe a droplet of fluid exuding from the cut surface of twig. What is this fluid?
View answer and explanation
Correct option: B
Phloem sap
Option B (Phloem sap) is correct because phloem sap contains sugars and nutrients and exudes from cut surfaces of twigs.
116
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Understanding
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The epidermal trichomes help in
View answer and explanation
Correct option: C
Protection and reduction of transpiration
Option C (Protection and reduction of transpiration) is correct because epidermal trichomes can protect the plant from herbivores and reduce transpiration by creating a boundary layer of still air near the leaf surface.
117
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Remembering
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In a flowering plant, the substances that
need to be transported is/are
need to be transported is/are
View answer and explanation
Correct option: D
All of these
Option D (All of these) is correct because flowering plants need to transport water, minerals, organic nutrients, and plant growth regulators.
118
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Remembering
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Bulk flow of water, minerals and organic solutes is due to?
View answer and explanation
Correct option: A
Pressure
Option A (Pressure) is correct because bulk flow, or mass flow, of water, minerals, and organic solutes is primarily driven by pressure gradients.
119
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Remembering
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Which type of soil has least water retaining capacity?
View answer and explanation
Correct option: A
Sandy soil
Option A is correct because sandy soil has large particles and large pore spaces, leading to rapid drainage and the least water retention capacity.
120
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Understanding
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The real forces responsible for the movement of water from one cell to another cell is mainly
View answer and explanation
Correct option: C
Diffusion pressure deficit
Option C (Diffusion pressure deficit) is correct because DPD represents the actual driving force for water movement from one cell to another.
Revision notes and key takeaways
Review TRANSPORT IN PLANTS in your textbook or class notes, then use this set to check your understanding.
Showing 91-120 of 205 questions