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

Glucose, gatactose and fructose all have the same molecular size and composition and their absorption through the mucosal cells takes place
  • At the same rate
  • Glucose is absorbed most rapidly
  • Fructose is absorbed most rapidly
  • Galactose is absorbed most rapidly
If three cells X, Y, and Z are joined to each other and their solute potential & turgor pressure values are given in the figure; then demonstrate the direction for the flow of water in this system:
768883_6862993378af49529e71bc5ad2f72650.png
Mention whether the following statement is true or false and give explanation in support of your answer.
Guttation in plants occurs maximum at mid-day.
  • True
  • False
A plant cell placed in hypotonic solution gets plasmolysed.
  • True
  • False
Mention whether the following statement is true or false and give explanation in support of your answer.
Guttation is another name for bleeding in plants.
  • True
  • False
Mention whether the following statement is true or false and give explanation in support of your answer.
Plasmolysis is reverse of deplasmolysis.
  • True
  • False
What indicate $$X, Y$$ in the given diagram?
851521_9af833c4464345ca9d1d2d46d3e9bce7.png
  • X-Cell surface membrane Y-Plasmodesma
  • X-Plasmodesma Y-Tonoplast
  • X-Cell surface membrane Y-Cytoplasm
  • X-Plasmodesma Y-Cell surface membrane
Cells that have lost their water content are said to be deplasmolysed.
  • True
  • False
Minerals enter a plant mainly by:
  • Diffusion
  • Pressure flow
  • Translocation
  • Active transport
Choose the correct answers from the alternatives given.
Which of the following structures or compartments is not part of the plants apoplast?
  • Lumen of a xylem vessel
  • Lumen of a sieve tube
  • Cell wall of a mesophyll cell
  • Cell walls of root hairs
Choose the correct answers from the alternatives given.
The Casparian strip affects:
  • How minerals move but not water
  • How water and minerals move into the vascular cylinder
  • Neither the flow of water nor the flow of minerals into a plant
  • How water move but not minerals
During rainy season wooden doors and windows are not properly closed. Why?
  • Plasmolysis
  • Diffusion
  • Osmosis
  • Imbibition
Choose the correct answers from the alternatives given.
Root pressure can be measured by
  • Osmometer
  • Potometer
  • Manometer
  • Porometer
Water transport from roots to leaves is explained by
  • The pressure flow theory
  • Differences in source and sink solute concentrations
  • The pumping force of xylem vessels
  • The cohesion-tension theory.
Which one of the following process of transporting substances across a membrane does not involve a change in the shape of the transport protein?
  • Active transport
  • $$Na^+ - K^+$$ pump
  • Simple diffusion
  • Facilitated diffusion
On a hot summer day cooling of the plant occurs due to
  • Loss of water vapours from leaf
  • Transport of water in plant
  • Loss of liquid water
  • Loss of water from entire plant
Choose the correct answers from the alternatives given.
Which of the following forces pushes water into the xylem as osmosis moves water into the root?
  • Water stress
  • Atmospheric pressure
  • Root pressure
  • Transpiration
State whether the following statements are true or false.
Lipid-soluble molecules are able to diffuse into a cell more rapidly than water-soluble molecules.
  • True
  • False
Choose the correct answers from the alternatives given.
Exudation
  • Takes place during positive root pressure
  • Takes place during negative root pressure
  • Is unrelated with root pressure
  • Is related with photosynthesis
Symplastic movement of water takes place through 
  • cell wall
  • plasmodesmata
  • endodermis
  • casparian strip
Choose the correct answers from the alternatives given.
The instrument which is used for measuring the humidity of air is known as
  • Hygrometer
  • Psychrometer
  • Auxanometer
  • Both A and B
Choose the correct answers from the alternatives given.
An example of selectively permeable membrane is
  • Plasmalemma
  • Cell wall
  • Chloroplast membrane
  • Mitochondrial membrane
Choose the correct answers from the alternatives given.
Osmosis involves the physiological processes that
  • Maintain shape of the plant
  • Maintain growth of young cells
  • Maintain turgor of guard cells
  • All of these
The given table shows properties of four cells systems A, B, C and D. The maximum rate of inward diffusion of water will be observed in which of these systems?
SystemIntracellular
concentration of water		Extracellular
concentration of water
A$$0.09$$M$$0.11$$M
B$$0.2$$M$$0.5$$M
C$$0.05$$M$$0.7$$M
D$$0.03$$M$$0.6$$M
  • System A
  • System B
  • System C
  • System D
Facilitated diffusion
  • Needs a carrier protein
  • Is an active process
  • Occurs against the concentration gradient
  • Needs ATP
Select the incorrect statement regarding facilitated diffusion.
  • It is a very specific process.
  • It is a passive process.
  • It helps the hydrophilic substances to be transported across the membrane.
  • It is faster than active process.
The type of diffusion in which substance move across the membrane along their concentration gradient in the presence of certain or transport proteins is called as 
  • Simple diffusion
  • Facilitated diffusion
  • Osmosis
  • Active transport
The pathway which water moves through cell wall without crossing any membrane
  • apoplast pathway
  • symplast pathway
  • vacuolar pathway
  • transmembrane pathway
Refer to the given figure. What does it represent?
885604_a0a77bc76efc4db3a3a6b9979103e017.png
  • Simple diffusion
  • Facilitated diffusion
  • Osmosis
  • Active transport
Osmosis is a special kind of diffusion, through which water diffuses across the cell membrane. The rate and direction of osmosis depends upon
  • Pressure gradient
  • Concentration gradient
  • Both (a) and (b)
  • Availability of ATP
Movement of the molecules of solids, gases or liquids from the region of their higher concentration to the region of their lower concentration is known as ___________.
  • Diffusion
  • Osmosis
  • Imbibition
  • Active transport
The flow of sap from endodermis toward xylem parts of the plants is due to:
  • Symplast pathway
  • Passage pathway
  • Apoplast pathway
  • HSK pathway
Water potential of a flaccid cell will be 
  • $$\Psi _w$$ = $$\Psi _s$$
  • $$\Psi _s$$= $$\Psi _p$$
  • $$\Psi _w$$ = 0
  • $$\Psi _w$$ = $$\Psi _s$$ - $$\Psi _p$$
If $$\Psi_w=$$ water potential; $$\Psi_s=$$ solute potential; $$\Psi_p=$$ pressure potential, then select the correct equation showing their inter-relation.
  • $$\Psi_w=\Psi_s-\Psi_p$$
  • $$\Psi_w=\Psi_s+\Psi_p$$
  • $$\Psi_s=\Psi_w+\Psi_p$$
  • $$\Psi_w=\Psi_s=\Psi_p$$
A plasmolysed cell can be deplasmolysed by placing it in _____________.
  • Pure water or hypotonic solution
  • Hypertonic solution
  • Isotonic solution
  • Saturated solution
Water passes into a cell due to __________.
  • OP
  • DPD
  • Turgor pressure
  • Diffusion
Select the incorrect statement regarding imbibition.
  • Imbibition is the phenomenon of adsorption of water or any other liquid without forming solution
  • The liquid which is imbibed is called as imbibate
  • There occurs a decrease in volume of imbibant during imbibition
  • Water is absorbed by germinating seeds through imbibition
In apoplast pathway, water moves exclusively through the
  • Plasmodesmata
  • Cell walls
  • Intercellular spaces
  • Both B and C
In a fully turgid cell
  • $$\Psi_w=\Psi_s+\Psi_p$$
  • $$\Psi_w=$$ zero
  • $$\Psi_w=\Psi_s-\Psi_p$$
  • $$\Psi_w=\Psi_s=\Psi_p$$
Read the given statements that refer to different stages of plasmolysis. Select the correct option regarding them.
(i) First stage of plamolysis, when osmotic concentration of cell sap is just equivalent to that of external solution.
(ii) Protoplast withdraws itself from corners of the cell wall.
(iii) Protoplast gets detached from the cell wall and attains a spherical shape.
  • (i)-Incipent plasmolysis, (ii)-Limiting plasmolysis, (iii)-Evident plasmolysis
  • (i)-Limiting plasmolysis, (ii)-Incipient plasmolysis, (iii)-Evident plasmolysis
  • (i)-Limiting plasmolysis, (ii)-Evident plasmolysis, (iii)-Incipient plasmolysis
  • (i)-Evident plasmolysis, (ii)-Incipient plasmolysis, (iii)-Limiting plasmolysis
Water potential of a flaccid cell will be
  • $$\Psi_w=\Psi_s$$
  • $$\Psi_s=\Psi_p$$
  • $$\Psi_w=0$$
  • $$\Psi_w=\Psi_s-\Psi_p$$
Movement of solvent molecule from a region of its higher concentration to a region of its lower concentration through a semi-permeable membrane, is referred to as?
  • Simple diffusion
  • Facilitated diffusion
  • Osmosis
  • Active transport
Salt is added to preserve meat, pickles, etc. because salting kills bacteria by the process of _______________.
  • Dissolution
  • Distillation
  • Plasmolysis
  • Imbibition
Given figure demonstrates the translocation of organic solutes according to pressure flow hypothesis.
Which out of the following statements is incorrect regarding this?

886124_83abdc42fbce4de1bb7dd2cc5646311f.png
  • A continuous high osmotic concentration is maintained in region P, which loads a sieve tube element by passively transporting solute molecules into it.
  • R shows the movement of $$H_2O$$ into sieve tube elements from nearby xylem vessels by osmosis.
  • Translocation of organic solutes takes place from region P with high turgor pressure to region Q with low turgor pressure.
  • In region Q, material is either consumed or is converted into insoluble storage forms resulting in decreased osmotic pressure.
Stomata : Transpiration : : Hydathode : ___________.
  • Guttation
  • Root pressure
  • Bleeding
  • Oozing
Loss or excretion of water in the form of liquid droplets from the margins and tips of leaves is called
  • Transpiration
  • Guttation
  • Bleeding
  • Precipitation
In the given flow chart, the flow of water is shown from soil to xylem of the root. Identify the tissues involved in steps A and B.
886014_61396a52d39444e981490f51bc1cd11d.png
  • A-Hypodermis; B-Protoxylem
  • A-Medullary rays; B-Phloem
  • A-Endodermis; B-Phloem
  • A-Endodermis; B-Protoxylem
Match column I with column II and select the correct option from the codes given.

Column IColumn II
A. Vein ending(i) Transpiration
B. Necessary evil(ii) Osmosis
C. Semi-permeable membrane(iii) Transpiration pull
D. Cohesion(iv) Guttation
E. Stomata closure(v) ABA
  • A-(iv), B-(i), C-(iii), D-(ii), E-(v)
  • A-(iv), B-(i), C-(ii), D-(iii), E-(v)
  • A-(iii), B-(v), C-(i), D-(ii), E-(iv)
  • A-(i), B-(ii), C-(iii), D-(iv), E-(v)
The process of guttation takes place
  • When the root pressure is high and the rate of transpiration is low
  • When the root pressure is low and the rate of transpiration is high
  • When the root pressure equals the rate of transpiration
  • When the root pressure as well as rate of transpiration are high
In which of the following pathways, movement of water occurs from one cell to another cell through plasmodesmata?
  • Apoplast pathway
  • Symplast pathway
  • Vacuolar pathway
  • Transmembrane pathway
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