CBSE Questions for Class 11 Medical Biology Transport In Plants Quiz 4 - MCQExams.com

Which of the following is correct?
  • DPD = OP $$\times$$ WP
  • WP = OP - DPD
  • OP = WP - DPD
  • DPD = WP - OP
The osmotic pressure of the cell sap is more in
  • Xerophytes
  • Hydrophytes
  • Mesophytes
  • Floating hydrophytes
The process of imbibition  involves
  • Only diffusion
  • Only capillary action
  • Both A and B
  • None of the above
Rubber does not swell in water due to absence of
  • Osmosis
  • Plasmolysis
  • Imbibition
  • Diffusion
The equal and opposite pressure to turgor pressure is
  • OP
  • SP
  • WP
  • None of the above
Osmotic potential of a solution is always
  • Positive
  • Negative
  • Zero
  • Variable
The first step in the flux of water into a plant seed is
  • Osmosis
  • Imbibition
  • Absorption
  • Suction
The factor that controls entry of water into the cell is
  • O.P.
  • I.P.
  • W.P.
  • T.P.
Diffusion of water into endodermis takes place through ?
  • Casparian strips
  • Passage cells
  • Both A and B
  • Special pores
Which of the following has the highest water potential $$(\Psi)$$?
  • 1 M salt solution
  • 1 M sugar solution
  • 1 M sugar solution with 2.3 bars pressure applied on it
  • Distilled water
If a solution of 0.1 M concentration is separated from water with the help of a semipermeable membrane, it develops an osmotic pressure of 2.3 bars and cause osmosis to occur. This means that osmosis could be stopped by
  • The application of a pressure of 2.3 bars on water side
  • The application of a pressure of 2.3 bars on solution side
  • The application of a pressure 2.3 bars on any side
  • Lowering a pressure of 2.3 bars on the solution side
When a solute is added to pure water the water potential
  • Becomes negative
  • Is lowered
  • Both A and B
  • Is increased
The potential exerted by insoluble colloids is termed as
  • Osmotic potential
  • Diffusion pressure
  • Matric potential
  • Water potential
The water potential of pure water is zero. If it is converted into a solution of 0.1 M concentration, the water potential
  • Remains unchanged
  • Is decreased by 0.1%
  • And solute potential is increased by 2.3 bars
  • Decreases by 2.3 bars
Hygroscopic water is not available to plants because 
  • $$\Psi$$ is greatly increased
  • DPD is greatly decreased
  • $$\Psi$$ becomes strongly negative
  • $$\Psi$$ is increased and DPD is decreased
'Osmosis is flow of solution from higher concentration to solution of lower concentration through semi-permeable membrane'. Which is incorrect in the statement?
  • Exact concentration of solution is not given
  • Character of semi-permeable membrane is not given
  • Flow of solution is not possible through semipermeable membrane
  • All of the above
Which of the following plant tissue of a tree has the lowest water potential?
  • Mesophyll of the upper most leaves
  • Mesophyll of the leaves borne on shaded branches
  • Xylem tissue of the main trunk
  • Endodermal cells of the root
Root hair cells under ordinary conditions typically have a $$\Psi$$ in the range of
  • 1 to 4 bars
  • -1 to 4 bars
  • 1 to 2 bars
  • -1 to -2 bars
The highest value of $$\Psi$$ is____________
  • 1
  • 0
  • 10
  • 100
0.1 M solution of a solute has a water potential of
  • -2.2 bars
  • 0 bar
  • 22.4 bars
  • +2.3 bars
Which one of the following is associated with free energy concept of water flux?
  • DPD
  • TP and OP
  • $$\Psi$$
  • None of the above
Match the following.
A. Crystals of $$CuSO_4$$ in water
(p) Imbibition
B. Doors swelled in rainy season
(q) Diffusion
C. Grapes placed in water
(r) Guttation
D. Water droplets on leaf margins
(s) Endosmosis
  • A-q, B-p, C-s, D-r
  • A-q, B-r, C-q, D-s
  • A-s, B-p, C-s, D-r
  • A-r, B-s, C-p, D-q
Water potential ($$\psi$$) of a solution is always
  • + Ve
  • - Ve
  • Zero
  • Variable
Which of the following statements are true/false?
(a) The positive hydrostatic pressure is called as turgor pressure.
(b) Wall pressure exerts to prevent the increase of protoplasm size.
(c) Diffusion is more rapid in liquids than in gases.
(d) Diffusion of water through a semi-permeable membrane is called as imbibition.
(e) Osmosis is movement of substances, which takes place along a diffusion gradient.
  • a and b are true and c, d and e are false
  • a and c are true and b, d and e are false
  • a and e are true and b, c and d are false
  • a, d and e are true and a and b are false
Swelling of wooden doors during rainy season is due to
  • Osmosis
  • Absorption
  • Imbibition
  • Endosmosis
The component, $$\Psi_s$$ denotes
  • Pressure potential
  • Gravity potential
  • Solute potential
  • Both A and B
Which of the following is the unit of measurement of water potential?
  • Watts
  • Joule
  • Pascal
  • Litre
  • Cubic centimeter
When a man supplies fertilizer to a plant and then watered it, its leaves turned brown after some time. This is because of
  • Osmosis
  • Plasmolysis
  • Diffusion
  • Deplasmolysis
Osmotic pressure is maximum in
  • Hydrophytes
  • Halophytes
  • Xerophytes
  • Mesophytes
The process by which water is absorbed by solids, like colloids causing them to increase in volume is called as
  • Osmosis
  • Plasmolysis
  • Imbibition
  • Diffusion
  • Facilitated diffusion
In a fully turgid cell, which one of the following is zero?
  • OP
  • TP
  • SP
  • None of the above
Pathway of water inside plant body after its absorption is by
  • Apoplast
  • Symplast
  • Both A and B
  • None of the above
Which of the following statements is/are true?
A. The apoplastic movement of water occurs exclusively through the cell wall without crossing any membranes.
B. Solutes present in a cell (or in any solution) increase the free energy of water or water potential.
C. The symplastic movement occurs from cell to cell through the plasmodesmata.
D. Membrane permeability depends on the membrane composition, as well as the chemical nature of the solute.
  • A and B only
  • B and D only
  • A, C and D only
  • A, B and D only
  • C only
Which statement is not true?
  • The casparian strips prevent water from moving.
  • The endodermis is a cell layer in the cortex.
  • The symplast is a meshwork consisting of the (connected) living cells.
  • Water can enter the stele without entering the symplast.
The accurate equation for presenting water potential is 
  • $$\Psi \omega \, = \Psi s\, +\,\Psi p\, +\, \Psi m$$
  • $$\Psi s = \Psi \omega \, +\,\Psi p\, +\, \Psi m$$
  • $$\Psi \omega = \Psi s \, -\,\Psi p\, -\, \Psi m$$
  • $$\Psi \omega = - \Psi s \, -\,\Psi p\, -\, \Psi m$$
Most of the water flow in the root takes place via the apoplast, because
  • Cortical cells are loosely arranged
  • Cortical cells are living cells
  • Cortical cells are thin walled cells
  • All of the above
Cell A and cell B are adjacent plant cells. In cell A, $$\Psi_s=-20 bars$$ and $$\Psi_p=8 bars$$. In cell B, $$\Psi_s=-12 bars$$ and $$\Psi_p=2 bars$$. Then,
  • Water moves from cell B to cell A
  • Equal amount of water is simultaneously exchanged between cell A and cell B
  • Water moves from cell A to cell B
  • There is no movement of water between cell A and cell B
In the active absorption, movement of water is through
  • Symplast
  • Free spaces
  • Apoplast
  • All of the above
Total amount of water present in the soil is called as
  • Chresard
  • Hollard
  • Echard
  • None of the above
Path of water movement from soil to xylem is
  • Metaxylem $$\rightarrow$$ Protoxylem $$\rightarrow$$ Cortex $$\rightarrow$$ Soil $$\rightarrow$$ Root hair
  • Cortex $$\rightarrow$$ Root hair $$\rightarrow$$ Endodermis $$\rightarrow$$ Pericycles $$\rightarrow$$ Protoxylem $$\rightarrow$$ Metaxylem
  • Soil $$\rightarrow$$ Root hair $$\rightarrow$$ Cortex $$\rightarrow$$ Endodermis $$\rightarrow$$ Pericycle $$\rightarrow$$ Protoxylem $$\rightarrow$$ Metaxylem
  • Pericycle $$\rightarrow$$ Soil $$\rightarrow$$ Root hair $$\rightarrow$$ Cortex $$\rightarrow$$ Endodermis $$\rightarrow$$ Protoxylem $$\rightarrow$$ Metaxylem
Value of the osmotic pressure of the cell sap in different types of plants is in the order of
  • Herbs > trees > shrubs
  • Trees > shrubs > herbs
  • Shrubs > herbs > trees
  • Herbs > shrubs > trees
Guttation drops can be differentiated from dew drops
  • By taste
  • As dew drops will be seen
  • As guttation drops will be restricted on the margins of the leaf
  • All of the above
Hydathodes are present on the
  • Upper surface of leaf
  • Lower surface of leaf
  • Tip of vein of leaf
  • Base of veins of leaf
Water drops present on leaf margins of Tropaeolum, balsam and grasses in early morning are due to
  • Guttation
  • Dew
  • Osmosis
  • Transpiration
Match the columns.
A. Water supply in the plant is due to
Capillary action
B. The particle principle by which blotting paper absorbs water is
Osmosis
C. Conduction of water against gravitational pull is due to
Transpiration
D. Carrier proteins are responsible for
Active ion transport
  • A-1, B-2, C-3, D-4
  • A-2, B-1, C-3, D-4
  • A-3, B-1, C-2, D-4
  • A-4, B-1, C-2, D-3
Theory of root pressure, is not acceptable because
  • It is not a potent scientific factor informing the water upward
  • Water continues to rise without root pressure and the later has seldom been observed in gymnosperms
  • Root pressure can take water up to height 100 ft. only
  • None of the above
Silicon emulsions are
  • Antitranspirants
  • Antirespirants
  • Hormones
  • None of these
Which of the following is incorrect about transpiration?
  • It causes transport of minerals.
  • Excessive transpiration leads to water stress.
  • Bleeding is caused by it.
  • None of the above.
Which of the following plants do not transpire?
  • Algae
  • Submerged hydrophytes
  • Fungi
  • All of the above
From epithem hydathodes, the water comes out due to
  • Imibibition pressure
  • Osmotic pressure
  • Root pressure
  • All of the above
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