NEET Biology MCQs The Transport in Plants [Free PDF ]

NEET Biology MCQs The Transport in Plants

  1. The given diagram shows cotransport method of two molecule. Labelled it correctly and choose the
    correct option accordingly a) A-Uniport, B-Symport, C-Antiport
    b) A-Uniport, B-Antiport, C-Symport
    c) A-Symport, B-Uniport, C-Antiport
    d) A-Antiport, B-Uniport, C-Uniport
  2. What are the aquaporins in facilitated diffusion process?
    a) Membrane proteins b) Carrier proteins c) Channel proteins d) Carrier lipids
  3. Which of the following osmotic situations does the figure demonstrate? a) Plasmolysis
    b) Turgid
    c) Reverse plasmolysis
    d) Diffused
  4. Read the following statement and choose the correct one from the codes given below
    I. The apoplastic movement of water takes place exclusively through intercellular spaces and cell wall
    without crossing any membrane
    II. Symplastic movement occurs from cell to cell through plasmodesmata, 𝑖.𝑒., adjacent cells are connected
    through plasmodesmata
    III. Permeability of a membrane depends on its composition and chemical nature of the solute
    IV. Solutes present in a cell increases the free energy of the water or water potential
    a) I, II and III b) I, II and IV c) II and IV d) I and IV
  5. When sugars enter sieve tubes, water flows by osmosis, resulting in
    a) Water potential b) Osmotic gradient c) Turgor pressure d) DPD
  6. The evaporative loss of water from the exposed part of plant is called
    a) Transpiration b) Guttation c) Loss of water d) Water bleeding

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  1. Which one of the following is not related to guttation?
    a) Water is given out in the form of droplets b) Water given out is impure
    c) Water is given out during daytime d) Guttation is of universal occurance
  2. Whose water potential is less than water potential of root hair during the water absorption by
    root hair?
    a) Gravitational water b) Soil solution c) Pure water d) Vacuolar sap
  3. A thin film of water is held by the soil particles under the influence of internal attractive force. It
    is called
    a) Hygroscopic water b) Gravitational water
    c) Combined water d) Capillary water
  4. Study the following statement and choose the correct option(s) from the codes from below
    I. Root pressure provides a light push in the overall process of water transport
    II. Root pressure causes the flow of water faster through xylem than it can be lost by transportation
    III. In symplast pathway, water move exclusively through the cell wall and intercellular spaces
    IV. Guttation is a cause of transpiration pull
    V. Most plants fulfill their water requirement by transpiration pull
    a) I, II and III are correct while IV and V are incorrect
    b) IV and V are correct while I, II and III are incorrect
    c) I and V are correct
    d) II and III are correct while I, IV and IV are incorrect
  5. What is required for the transport of substances through a membrane from a region of lower
    concentration to higher concentration?
    a) Input of energy b) Output of energy c) Facilitated diffusion d) Nothing is required
  6. Which of the following statement is correct?
    a) DPD=OP-WP b) DPD=OP+WP c) DPD=WP-OP d) DPD=TP+OP
  7. Choose the correct combination of labeling of stomatal apparatus of dicot and monocot leaves a) A-Epidermal cells B-Subsidiary cells C-Chloroplast D-Guard cells E-Stomatal aperature
    b) A-Epidermal cells B-Guard cells C-Chloroplast D-Subsidiary cells E-Ctomatal aperature
    c) A-Epidermal cells B-Subsidiary cells C-Chloroplast D- Stomatal aperature E- Guard cells
    d) A- Subsidiary cells B- Epidermal cells C-Chloroplast D- Stomatal aperature E- Guard cells
  8. In a plant organ, which is covered by periderm and in which the stomata are absent, some
    gaseous exchange still takes place through
    a) Aerenchyma b) Trichomes c) Pnenumatophores d) Lenticels
  9. Identify the correct statements from the following:
    I.Accumulation of K+ ions in the guard cells does not require energy.
    II.A high pH favours stomatal opening.
    III.Movement of chloride ions into the guard cells accrues in the response to the electrical
    differential created by K+ ions.
    IV.With the entry of several K+ ions and chloride ions, the water potential of guard cells increases.
    a) I and III b) I and II c) II and III d) III and IV

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  1. Which one of the following is the reason for higher rate of transpiration in Sorghum as compared
    to maize?
    a) Increased shoot/root ratio b) Increased rate of respiratory quotient
    c) Increased rate of phototsynthesis d) Decreased shoot/root ratio
  2. If turgidity of a cell surrounded by water increases, the wall pressure will
    a) Increase b) Decrease c) Fluctuate d) Remain unchanged
  3. In plants; which of the following are/is translocated through phloem?
    a) Hormones b) Amino acids c) Sugars d) All of these
  4. Root pressure is due to
    a) Diffusion b) Passive transport c) Active transport d) Osmosis
  5. What is depicted by the given diagram below? a) Measuring the rate of transpiration b) Demonstration of ascent of sap
    c) Demonstration of transpiration d) Both (a) and (c)
  6. Choose correct statements regarding the flow of sap in xylem?
    I. Flow is driven by higher concentration of sugar in the vessel elements
    II. Flow from root to twigs and leaves would be reduced if leaves are removed
    III. In the morning, sap begins to flow first in the twig then in trunk
    IV. Rapid flow of water put tissues under pressure much more than atmospheric pressure
    a) I and IV b) II and III c) I, II, III and IV d) No one is correct
  7. Stomatal opening is regulated by
    a) Light b) Temperature
    c) Atmospheric humidity d) Wind
  8. The direction of movement in phloem is …A… and that of xylem is …B… .
    Choose the correct pair of options
    a) A-downwards; B-downwards b) A-only upwards; B-only downward
    c) A-unidirectional; B-bidirectional d) A-bidirectional; B-unidirectional
  9. Which of the following theories for ascent of sap was proposed by an eminent Indian scientist J C
    Bose?
    a) Pulsation theory b) Relay pump theory
    c) Transpiration pull theory d) Root pressure theory
  10. The potential energy of water is referred as
    a) Water potential b) Osmotic potential c) Gravity potential d) Pressure potential
  11. If two solutions have the same osmoregularity, they are said to be
    a) Hypertonic b) Hypotonic c) Isotonic d) None of these
  12. Plant obtain carbon and most of their oxygen from
    a) Soil b) Water
    c) CO2 from the atmosphere d) Symbiotic organisation
  13. When plant cell is kept in saline drip, cell
    a) Decrease in size b) Bursts out c) Increase in size d) Unchanged

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  1. Carrier protein, which allows the diffusion of two type of molecules in the same direction is
    a) Symport b) Antiport c) Both (a) and (b) d) Uniport
  2. Hydroponics is the method of
    a) Water conservation b) Plant development in water without soil
    c) Plant development without soil d) Plant development in saline soil
  3. Imbibition is always accompanied by swelling or increase in the volume of imbibint However, the increase
    in the volume of the imbibant is
    a) More than the volume of water imbibed
    b) Same as the volume of the water imbibed
    c) Less than the volume of the water imbibed
    d) Depends upon the type of imbibant
  4. Which of the following is responsible for the transport of water and minerals from roots to stems, leaves,
    flowers and fruits in rooted plants?
    a) Xylem b) Phloem c) Either (a) or (b) d) Both (a) and (b)
  5. Loss of liquid water by guttation occurs through
    a) Hydathodes b) Stomata c) Cuticle d) Bark
  6. The process by which water is absorbed by solids like colloid causing them to increase in volume,
    is called
    a) Osmosis b) Plasmolysis c) Imbibition d) Diffusion
  7. Choose the correct combination of labeling of the potato osmoscope experiement. a) A-Final level B-Dotpin
    C-Initial level D-Sugar solution
    E-Potato tuber
    b) A-Initial level B-Dotpin
    C-Final level D-Water
    E-Potato tuber
    c) A-Final level B-Dotpin
    C-Initial level D-Water
    E-Potato tuber
    d) A-Final level B-Dotpin
    C-Initial level D-Water
    E-Container
  8. How will you distinguish between the method of transport between xylem and phloem?
    a) Active transport move xylem but not phloem sap
    b) Transport, in xylem is unidirectional and saps move upward, while phloem sap moves ups and down
    c) Transpiration does not move xylem sap, but it moves phloem saps
    d) Transport of substances take place from source to sink by both the tissues
  9. Which one of the following is not an antitranspirant?
    a) PMA b) BAP c) Silicon oil d) Low viscosity
  10. Statoliths are involved in

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a) Phototropism b) Hydrotropism c) Chemotropism d) Gravitropism

  1. In plasmolysed cell, the space between nucleus and plasma membrane is occupied by
    a) Hypotonic solution b) Hypertonic solution
    c) Isotonic solution d) Air
  2. The sugarcane plant has
    a) Dumb bell-shaped guard cells b) Pentamerous flowers
    c) Reticulate venation d) Capsular fruits
  3. Water potential and osmotic potential of pure water is
    a) Zero and zero b) 100 and zero c) 100 and 100 d) Zero and 100
  4. When pea seeds and wheat seeds are put in water, which of the two will imbibe more water?
    a) Wheat seeds b) Pea seeds
    c) Both will imbibe equal amount of water d) Pea seeds imbibe water only at alkaline pH
  5. Nyctinasty and seismonasty in plants like bean and touch me not are produced due to
    a) Reversible osmotic potential in the cells
    b) Reversible turgor pressure in the cell of their pulvini
    c) Due to less pressure potential in the cells
    d) Presence of less turgidity in the cells
  6. Following statements are related with the diffusion of coloured molecules across a membrane. Select the
    correct statement, which shows the fastest rate of diffusion?
    a) An internal concentration of 15% and external
    concentration of 10%
    b) An internal concentration of 25% and external
    concentration of 50%
    c) An internal concentration of 50% and external
    concentration of 25%
    d) Both (b) and (c) shows fastest rate of diffusion
  7. Choose the false statement
    a) If bark of tree is girdled from main stem, the plant dies because ascent of sap is stopped
    b) If xylem is girdled from main stem, wilting of leaves tales place
    c) In the flowerering plant food is transported in the form of dissacharide sucrose
    d) In Girdling experiment, in a plant, root dies first
  8. Sunken stomata is found in the leaves of
    a) Trifolium b) Lemma c) Nerium d) Lilium
  9. Who proposed cohesion theory of water movement in plants?
    a) JC Bose b) Priestly c) Dixon and Jolly d) TV Englemann
  10. Study the following picture and the statements given below and choose the correct option

I. The above diagram shows the net movement of water from the dilute to concentrated solution
II. The two solutions are separated by a differentially permeable membrane
III. Water molecule strikes the membrane randomly on both the sides and pass through the same
IV. Diffusion of water does not occur from its lower chemical potential to higher chemical potential
a) I, II, III and IV b) I, II and III c) I, II and IV d) I and IV

  1. Read the following statements and choose the correct option given below
    I. Major account of transpiration takes places through surface/margin of leaves
    II. A little amount of water is lost through stem, this is reffered to cauline transpiration
    III. Transpiration is comparatively a slow process then evaporation

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IV. Transpiration driven ascent of sap does not depend on cohesion, adhesion and surface tension
properties of water
a) I, II, III and IV b) I, III and II c) I, II and IV d) II, III and IV

  1. Direction of translocation of organic food or solutes, is
    a) Upward b) Downward c) Radial d) All of these
  2. The water available to plants for absorption is
    a) Gravitational water b) Hygroscopic water
    c) Capillary water d) Chemically bound water
  3. Which of the following theory gives the latest explanation for the closure of stomata?
    a) ABA theory b) Munch theory
    c) Starch glucose theory d) Active K+transport theory
  4. What will be the effect of accumulation of K+ions in guard cells?
    a) Water potential increases b) Water potential decreases
    c) Loss of turgidity d) Exosmosis
  5. Why all the minerals present in soil can not be passively absorbed by roots?
    a) Mineral existence as ions is more than absorption
    b) Due to less concentration of ion in root interior than soil
    c) Due to more concentration of ions in root interior than in soil
    d) None of the above
  6. Which one is not the job of zone of cell differentiation in roots?
    a) Mineral uptake b) Water uptake c) CO2 uptake d) O2 uptake
  7. Which one is against the theory of ascent of sap given by Dixon and Jolly?
    a) Pores in treachery elements b) Cohesion force of water molecules
    c) Adhesion force of water molecules d) Requirement of ATP
  8. Attraction of water molecules to polar surfaces is known as
    a) Cohension b) Capillarity c) Surface tension d) Adhesion
  9. The epidermal trichomes help in
    a) Transpiration and exchange of gases b) Protection from desiccation
    c) Protection and reduction of transpiration d) Exudes water drops from their tips
  10. In land plants, the guard cells differ from other epidermal cells in having
    a) Mitochondria b) Endoplasmic reticulum
    c) Chloroplasts d) Cytoskeleton
  11. The values of osmotic potential (π) and pressure potential (ρ) of cells A, B, C and D are given
    below.
    Cell 𝛑 𝛒
    A -1.0 0.5
    B -0.6 0.3
    C -1.2 0.6
    D -0.8 0.4
    Identify the correct sequence that shows the path of movement of water from among the
    following.
    a) D→C→A→B b) B→D→A→C c) B→C→D→A d) C→B→A→D
  12. The experimental set up shown in the adjacent diagram is for

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a) The demonstration of development of suction force due to transpiration
b) Measuring the rate of transpiration
c) The demonstration of ascent of sap
d) The demonstration of anaerobic respiration

  1. Arrange the events of opening stomata in correct sequence and choose the correct option accordingly
    I. Lowering of osmotic potential of guard cells
    II. Decline in guard cell solute
    III. Rise of potassium ion level in guard cells
    IV. Guard cells absorb water from neighbouring epidermal cells
    V. Guard cells become flaccid
    VI. Guard cells swells and make a pore between them
    a) III, I, IV, V b) I, II, III, IV, V, VI c) III, I, IV, VI d) III, I, IV, VI, II, V
  2. In the given flow chart, the pathway of water movement is shown from soil to xylem. Identify A-E and
    choose the correct option accordingly a) A-Stomatal pore, B-Endodermis, C-Casperian strip,
    D-Symplast, E-Apoplast
    b) A-Plasmodesmata, B-Palisade, C-Medullary rays,
    D-Symplast, E-Apoplast
    c) A-Plasmodesmata, B-Endodermis, C-Casperian
    strip, D-Apoplast, E-Symplast
    d) A-Stomatal pore, B-Guard cell, C-Medullary rays,
    D-Apoplast, E-Symplast
  3. Water potential increases due to
    a) Addition of solute b) Evaporation
    c) Addition of inorganic substances d) Increase in pressure
  4. Why seeds imbibe and swell after keeping in water?
    a) OP inside the seed is low
    b) OP of water is high
    c) Water potential gradient developes between the seed coat and water
    d) Diffusion pressure deficit of seed is very high
  5. If you are given a task to analyse phloem sap chemical, which of the following will be present in least
    concentration?
    a) Water b) Sugar
    c) Minerals and nitrogen d) Hormones

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  1. Some elements like calcium are not remobilised because they are
    a) Structural component b) Heavy metals c) Less charged d) Macromolecules
  2. Movement of molecules in three forms of matter, from a region higher concentration to a region of lower
    concentration can be termed as
    a) Osmosis b) Passive transport c) Diffusion d) Active transport
  3. In plants, water supply is due to
    a) Osmosis b) Imbibitions c) Guttation d) Adhesion force
  4. Which part of root absorbs both water and minerals?
    a) Zone of cell differentiation b) Zone of cell formation
    c) Zone of cell elongation d) Terminal portion of root
  5. Diffusion pressure deficit is also called
    a) Suction pressure b) Turgor pressure c) Osmotic pressure d) None of these
  6. Which of the following transport induces conformational changes in proteins?
    a) Simple diffusion b) Osmosis c) Facilitated diffusion d) Plasmolysis
  7. Diffusion, a process occur(s) along the concentration gradient is actively involved in
    a) Transpiration b) Respiration c) Photosynthesis d) All of these
  8. Which of the following mechanism can explain the transport of sucrose from source to sink?
    a) Osmotic movement of water into sugar loaded sieve tube cells which create a higher hydrostatic
    pressure into the source than in the sink
    b) Tension created by differences in pressure potential between source and sink
    c) Active absorption of sucrose through sieve tube membrane driven by a specific pump
    d) Transpiration and active transport of sugar from source to sink
  9. Which of the following cells are not related to the structure of stomata?
    a) Sclerenchymatous cells b) Epidermal cells
    c) Guard cells d) Accessory cells
  10. Choose the correct option to label 𝐴-𝐶 in the given diagram of stomatal apparatus A B C a) Stomatal aperture Subsidiary Guard cells
    b) Cellulose micro fibrils Subsidiary cells Stomatal aperture
    c) Stomatal aperture Guard cell Epidermal cells
    d) Stomatal aperture Guard cell Cellulosic micro fibrils
  11. Water lost in Guttation is
    a) Pure water b) Impure water c) In vapour form d) Either (A) or (B)
  12. The approximate length of root hair zone in plants
    a) 1-10 cm b) 1-15 cm c) 1-6 cm d) 1-20 cm
  13. When the conditions are dry, a grass leaf curls inward to minimize water loss due to the pressure
    of
    a) Thick cuticle b) Large xylem cavities
    c) Parallel venation d) Bulliform cells
  14. Cell A has Ψw−3 bars and cell B has Ψw−8 bars. The movement of water will be from
    a) Cell A to cell B

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b) Cell B to cell A
c) Data insufficient
d) Water can not move in negative value of ΨW

  1. Transpiration is measured by
    a) Photometer b) Porometer c) Auxanmeter d) Respirometer
  2. A cell swells up when kept in
    a) Hypotonic solution b) Hypertonic solution
    c) Isotonic solution d) All of the above
  3. Which of the following statements are true/false?
    I. The positive hydrostatic pressure is called turgor pressure.
    II. Wall pressure exerts to prevent the increase of protoplasm size.
    III. Diffusion is more rapid in liquids than in gases.
    IV. Diffusion of water through a semi-permeable membrane is called imbibition.
    V. Osmosis is movement of substance, which takes place along a diffusion gradient.
    a) I and II are true, while III, IV and V are false
    b) I and III are true, while II, IV and V are false
    c) I and IV are true, while II, III and V are false
    d) I and IV are true, while II, III and IV are false
  4. When a plasmolyzed cell is placed in a hypotonic solution then water will move inside the cell.
    Which force causes this?
    a) DPD b) OP c) WP d) None of these
  5. Which one of the following denotes the water potential of the mesophyll cell in wilted condition?
    a) Equal to the value of osmotic potential
    b) Equal to the value of pressure potential
    c) Greater than the value of its osmotic potential
    d) Equal to zero
  6. Sugar stored in roots may be mobilised to become a source of food in the
    a) Winters b) Early spring c) Summers d) Early summers
  7. Choose true and false statements from the following
    I. Mycorrhizal association between fungus and root of plant (𝑃𝑖𝑛𝑢𝑠) is often obligate
    II. 𝑃𝑖𝑛𝑢𝑠 and orchid seeds can germinate and grow into plant in absence of mycorrhizal association
    III. Absorption of water along with mineral solute by root hairs is purely a process of diffusion
    IV. In apoplast pathway, movement of water takes place through cell wall and intercellular spaces
    V. Fungal hyphae provide sugar and organic internal to root
    Choose the correct option
    a) I, II and III are true while IV and V are false
    b) IV, and V are true while I, II and III are false
    c) I and IV are true
    d) I, II and V are true
  8. Which of the following is the unit of measurement of water potential?
    a) Watt b) Joule c) Pascal d) Litre
  9. Which type of water is used by the plants?
    a) Gravitational water b) Capillary water c) Hygroscopic water d) Bound water
  10. Water in the vessel of xylem in tall plant is
    a) Pushed
    b) Pulled
    c) Pulled and pushed

d) First pushed and it is pulled slowly

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