Transport In Plants Questions

We provide transport in plants practice exercises, instructions, and a learning material that allows learners to study outside of the classroom. We focus on transport in plants skills mastery so, below you will get all questions that are also asking in the competition exam beside that classroom.

List of transport in plants Questions

Question No Questions Class
1 Set up an experiment to demonstrate
root pressure.
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2 Root pressure in maximum, when
A. Transpiration is high and absorption is very low.
B. Transpiration is very low and absorption is high.
C. Absorption is very high and transpiration is also very high.
D. Absorption is very low and transpiration is also low.
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3 Select the odd one our w.r.t. porins.
A. Not associated with the inner membrane of plastids
B. Associated with the outer membrane of mitochondria
C. Found in outer membrane of gram positive bacteria
D. Allow movement of low molecular weight hydrophilic substances
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4 In plant relations, ( Psi ) indicates
A. DPD
B. Solute potential
c. water potential
D. Suction pressure
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5 Translocation of photosynthetic end products in sieve tubes is
( A cdot 3-5 m m / ) hour
B. 3 – 5 cm / hour
c. ( 1-15 mathrm{cm} / ) hour
D. ( 50-100 mathrm{cm} / ) hour
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6 Which of the following is involved in the transport of water in the tall plants?
A. Root pressure theory
B. Transpirational pull
c. cohesion and adhesion
D. Both A and C
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7 Force of cohesion develops due to
A . Attraction between similar molecules
B. Attraction between different molecules
c. surface tension at the interface
D. All the above.
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8 Active transport across cell membrane
requires
A. Glucose
B. Steroids
c. Energy in the form ATP
D. Proteins and glucose
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9 Salt is added to preserve meat, pickles, etc. because salting kills bacteria by the process of
A. Dissolution
B. Distillation
c. Plasmolysis
D. Imbibition
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10 Dry seeds when placed in water swell up
due to
A. Imbibition
B. Absorption
c. Diffusion
D. Adsorption
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11 The phenomenon of uptake of water at
the expense of energy by the cell and usually against the osmotic gradient is
known as
A. Active absorption
B. Passive absorption
c. osmosis
D. Diffusion
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12 lon uptake is called active because
A. Ions are active
B. Energy is expended
c. lons move freely
D. Ions move passively
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13 The function of Anti-transpirants is:
A. Reduce the rate of transpiration without affecting carbon assimilation
B. Reduce the rate of transpiration affecting carbon assimilation
C. Reduce the rate of transpiration affecting growth of plant
D. Reduce the rate of transpiration affecting protein synthesis of plant
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14 A carrier protein transfers a solute across the phospholipid bilayer via facilitated diffusion behaves much like
an enzyme-substrate reaction. A distintction between the process by
which an enzyme converts substrate to product and facilitated transport is
A. Solutes are able to undergo transport without chemical modification
B. Solutes are restricted to flow in one direction depending on the orientation of the carrier protein.
C. Solutes are directly transported without interacting with or influencing the conformational state of the carrier protein.
D. Solutes are transported whether or not there is a competitive or noncompetitive inhibitor present.
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15 Root pressure can be demonstrated by means of
A. Wilting
B. Guttation
c. Transpiration
D. Exudation/bleeding
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16 In maize, sugar, beet etc., the translocation of carbohydrate is
A. Apolar
B. Polar
c. Basipetal
D. None of the above
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17 An animal cell when placed in a ( 0.9 % )
solute solution, the cell will
A. Remain unchanged.
B. Swell and burst.
c. Shrivel
D. Swell and divide
E. Release solute by exocytosis
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18 The pressure exerted on the fluid contents of the cortical cells of root by turgidity, which forces the water into
xylem vessels and upward into stem for a certain height is
A. Imbibition
B. Root pressure
c. capillarity
D. None of the above
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19 Choose the correct answer from the
alternatives given
Active transport
A. Requires an input of ATP
B. Is involved in diffusion
c. occurs in osmosis and facilitated transport
D. All of the above
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20 Wilting of plant is present in
A. Moss
B. Fern
c. Algae
D. Gymnosperm
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21 Water potential in the leaf tissue is positive (+ve) during
A. Excessive transpiration
B. Low absorption
c. Low transpiration
D. Guttation
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22 A living continuum of cells connected by plasmodesmata is
A. Dermal tissue
B. Ground complex
c. Donnan free space
D. symplast
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23 Root pressure helps in
Continuous flow of water in plants
ii Pulling force iii Replacement of lost water
B. ii, ii
c. i, ii i
D. All of the above
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24 For transport of food in plants it requires
A. ATP and phloem
B. ADP and phloem
c. ATP and xylem
D. ADP and xylem
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25 Which one of the following will reduce the rate of transpiration?
A. Increase in wind velocity
B. Rise in temperature
c. Increase in water uptake by plants
D. Decrease in light intensity
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26 Briefly explain how transpiration helps in upward conduction of water in plants?
( (a) )
( (b) )
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27 Which of the following method involves the movement of molecules from
the region of higher concentration to the lower concentration?
A. Diffusion
B. Osmosis
c. Chemiosmosis
D. Plasmolysis
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28 Organic substances such as sugars are translocated in phloem can be demonstrated by
A. Defoliation
B. Girdling the stem
c. Grafting
D. Root pressure
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29 In Vallisneria, stomata are
A. Present on upper epidermis of leaf.
B. Present on lower epidermis of leaf.
C. Present on both the epidermis of leaf.
D. Absent.
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30 What is the direction of movement of
sugar in phloem?
A. Non-multidirectional
c. Downward
D. Bi-directional
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31 Stomata open and close due to
A. Turgor pressure change
B. Hormonal change.
c. Temperature change
D. All of the above.
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32 Translocation of organic materials is best explained by
A. Active transport
B. Transpiration pull
c. Imbition theory
D. Mass flow hypothesis
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33 The translocation of organic solutes in sieve tube members is supported by
A. Mass flow involving a carrier and ATP
B. Cytoplasmic streaming
c. Root pressure and transpiration pull
D. P-proteins
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34 Which of the following is not a function of water in cell?
A. It provides energy for chemical reaction.
B. It act as a solvent
c. It provides medium for chemical reaction.
D. It releases hydrogen ions on ionisation.
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35 Active uptake of minerals by root mainly depends on the
A. Availability of oxygen
B. Light
c. Temperature
D. Availability of carbon dioxide
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36 What happens when wilted vegetable are dipped in water
A. They regain their size
B. Remain to be same
c. colour will change
D. Decrease in size because of lose of water
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37 What do ( A, B, C ) and D represent in the
following figure?
A. A : Carrier protein, B : symport, C : uniport, D : antiport
B. A : Carrier protein, B : uniport C : antiport, D : symport
C. A : Carrier protein, B : antiport, C : symport, D : uniport
D. A : Carrier protein, B : uniport, C : symport, D : antiport
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38 In tall plants, because of which factor,
continuous water column extends
upward?
A. Atmospheric pressure
B. Osmotic pressure
c. suction pull
D. Root pressure
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39 Osmosis is
A. Passage of solvent only through a semipermeable membrane.
B. Passage of solutes only through a membrane.
C. Passage of both solvent and solute through a membrane.
D. Passage of solution through a protoplasm.
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40 Uphill transport i.e., movement of substances from their lower
concentration to their higher concentration occurs in
A. Simple diffusion
B. Facilitated diffusion
c. Active transport
D. Both B and C
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41 Choose the correct answers from the
alternatives given

Root pressure can be measured by
A. Osmometer
B. Potometer
c. Manometer
D. Porometer

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42 According to Munch hypothesis osmotic pressure remains high in the mesophyll cells due to
A. Accumulation of food brought by phloem
B. Accumulation of salts brought by xylem
c. conversion of starch into sugar
D. synthesis of soluble carbohydrates due to photosynthesis
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43 Compare the imbibing capacities of pea
and wheat seeds.
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44 Terms apoplast and symplast were first
used by
A. Clark
B. Munch
c. Dixon
D. Lundegardh
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45 The breathing organ in the plant is
A. Lungs.
B. Stomata.
c. Gills
D. Seeds
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46 Water rises in the stem due to
A. Cohesion and transpiration pull
B. Turgor pressure
c. osmotic pressure
D. None of the above
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47 Theory of root pressure, is not
acceptable because
A. It is not a potent scientific factor informing the water upward
B. Water continues to rise without root pressure and the later has seldom been observed in gymnosperms
C. Root pressure can take water up to height 100 ft. only
D. None of the above
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48 Osmotic theory for an active absorption
of water was given by
A. Thimann
B. O. Hertwig
c. Atkins and Priestley
D. J. C. Bose
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49 Sieve tubes are better suited for
translocation because these
A. Are broad and long
B. Possess bordered pits
c. Possess no end walls
D. Possess a broader lumen and perforated cross walls
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50 The transport system in plants is made
up of
A. Xylem
B. Vascular tissues
c. Phloem
D. None of the above
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51 The continuity of water column in xylem is maintained due to
A. Evaporation of water
B. Cohesive property of water
c. Pressure of air bubbles in water
D. Small size of xylem vessels
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52 Mark true statement about apoplast
pathway.
A. Apoplast pathway may be aided by cytoplasmic streaming
B. Apoplast pathway is continuous throughout the plant without any exception
C. Apoplast pathway is faster than symplast pathway
D. In Apoplast pathway mass flow of water occurs through plasmodesmata
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53 In mesophytes, maximum transpiration
occurs through
A. Cuticle
B. Lenticel
c. Stomata
D. Hydathodes
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54 The girdling or ringing experiment
involved
A. Tying a metallic ring to a stem
B. Removal of a ring of tissue external to xylem
C. Marking a ring shaped area on the stem
D. None of the above
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55 The highest value of ( Psi )
is
( mathbf{A} cdot mathbf{1} )
B.
c. 10
D. 100
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56 Medicinal plant harvested from wild for anticancer compound is
A. Taxus baccata
B. Datura stramonium
c. Rauwolfia serpentina
D. Ocimum sanctum
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57 What is transpiration? Where does it
occur?
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58 Which tissue are removed when a plant
is girdled?
A. Xylem and pith
B. Xylem and phloem
c. Phloem to epidermis
D. Phloem to pith
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59 The movement of water from higher water potential to lower water potential through a semi-permeable membrane is called as
A. Diffusion
B. Osmosis
c. Plasmolysis
D. Imbibition
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60 Pathway of water inside plant body after its absorption is by
A. Apoplast
B. Symplast
c. Both A and B
D. None of the above
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61 Transpiration occurs through
A. Leaves
B. Stem
c. Roots
D. None of the above
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62 Root pressure is maximum when
A. Transpiration is high and absorption low
B. Transpiration is very low and absorption is high
C. Transpiration is very high and absorption is high
D. Transpiration and absorption both are slow
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63 In active transport, ATP energy is used by carrier proteins to transport materials
A. Against concentration gradient across cell membrane
B. Against concentration gradient across cell wall
c. Along concentration gradient across cell wall
D. Along concentration gradient across cell membrane
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64 What is correct about the movement of
substance across the membrane in
facilitated diffusion?
A. It is an active transporttt
B. It doesn’t cause transport of molecules from lower concentration to higher
c. it does not require a carrier protein
D. It works against concentration gradient
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65 Which of the following factor is responsible for regulating the size of the potato slices during osmosis?
A. Increased salt concentration
B. Increased pressure
c. Increased temperature
D. Increased humidity
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66 Sunken stomata are found in leaves of
A. Trifolium
B. Lemna
c. Nerium
D. Lilium
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67 Water supply in the plant is due to
A. Osmosis
B. Guttation
c. cohesion force
D. Imbibition
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68 To initiate cell plasmolysis, the soution outside the cell must be
A. Isotonic
B. Hypotonic
c. Hypertonic
D. Atonic
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69 Facilitated diffusion involves the
movement of
A. Small, charged and polar molecules with the help of ATP
B. Small, neutral and nonpolar molecules with the help of ATP
c. Small, neutral and nonpolar molecules without an ATP requirement.
D. Small, charged and polar molecules without an ATP requirement.
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70 Active transport is characterised by
A. Requires special membrane proteins
B. Highly selective
c. Requires ATP energy
D. All of the above
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71 Short / Long answer type questions. Why do most substances have to be assisted through the plasma membrane? Contrast movement by
facilitated transport with movement by active transport.
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72 The flow of sap from endodermis toward xylem parts of the plants is due to:
A. Symplast pathway
B. Passage pathway
c. Apoplast pathway
D. HSK pathway
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73 Assertion
A mangrove tree growing in marshy
place has pneumatophores.
Reason
Pneumatophores helps in better
anchorage to marshy soil.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion.
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
C. Assertion is correct but Reason is incorrect.
D. Both Assertion and Reason are incorrect.
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74 By which mechanism water is absorbed
under low transpiring conditions?
A. Osmosis
B. Active absorption
c. Both of the above
D. Passive absoprtion
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75 Which of the following means of transmembrane transport involves the expenditure of energy by the cell and can move materials up a concentration gradient?
A. Osmosis
B. Facilitated diffusion
c. simple diffusion
D. Active transport
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76 An experiment was set up as shown in
the figure below. After some time, the water level in test tube ( A ) fell down but
not in test tube B.

Why was there a fall in the water level of test tube ( A ) and not in that of test
tube B?

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77 Glucose, gatactose and fructose all
have the same molecular size and
composition and their absorption through the mucosal cells takes place
A. At the same rate
B. Glucose is absorbed most rapidly
c. Fructose is absorbed most rapidly
D. Galactose is absorbed most rapidly
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78 The diagram shows four different cells. Which cells provide a large surface area for absorption?
A . 1 and 2
B. 1 and 3
( c cdot 2 ) and 4
D. 3 and
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79 Root pressure is measured by
A. Potometer
B. Barometer
c. Manometer
D. Auxanometer
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80 Differentiate between
Hygroscopic Water and capillary Water
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81 Active and passive absorption terms
were coined by
A. Kramer
B. Deutrochet
c. Priestley
D. Renner
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82 Choose the correct answer from the
alternatives given.

Which is the best definition of active
transport?
A. Movement of molecules from an area of their higher concentration to an area of their lower concentration
B. Movement of water across a semi-permeable membrane from an area of high water concentration to an area of lower water concentration
C. Movement of molecules from an area of their lower
concentration to an area of their higher concentration
D. Movement of a substance against its concentration through the release of energy from ATP

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83 Which of the following is appropriate for
mass-flow hypothesis?
A. Transpiration pull is responsible for absorption of ions
B. Large amount of ions are also absorbed along with the absorption of water
C. As suction pressure increases, absorption of water increases and along with water, absorption of ion also increases
D. All the given options
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84 Which one keeps its stomata open during night and closed during day?
A. cactus
B. Water lily
( c . ) Ivy
D. Hibiscus
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85 Leaves of submerged hydrophytes are
A. Epistomatic
B. Hypostomatic
c. Astomatic
D. Both A and B
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86 Transpiration increases with increase
in
A. Humidity
B. Temperature
c. Minerals
D. Soil moisture
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87 Assertion
Mass or bulk flow is the movement of
substances in bulk from source to sink
as a result of pressure differences.
Reason
Water, minerals and food are generally moved by mass flow.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
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88 The pathway which water moves through cell wall without crossing any membrane
A. apoplast pathway
B. symplast pathway
c. vacuolar pathway
D. transmembrane pathway
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89 Imbibition involves
A . Solute potential
B. Gravity potential
c. Matric potential
D. Pressure potential
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90 Mass-flow hypothesis is also known as
A. Pressure flow hypothesis
B. Accelerated diffusion theory
c. conventional flow hypothesis
D. None of the above
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91 Starch is insoluble in water yet it is accumulated in large quantities in
potato because
A. It is synthesized in potato tuber itself
B. It is translocated from the leaves to the potato tuber in the form of sugar and stored there as starch.
c. Soil micro-organsim deposit starch in tuber.
D. It is useful consumption
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92 Which of the following is not a function of transpiration?
A. Excretion of minerals
B. Cooling of leaves
c. Uptake of water
D. Uptake of minerals
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93 The force of cohesion tension exceeds
root pressure on a
A. Rainy day
B. Foggy morning
c. sunny day
D. Full moon night
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94 In which of the following pathways, movement of water occurs from one cell
to another cell through plasmodesmata?
A. Apoplast pathway
B. Symplast pathway
c. vacuolar pathway
D. Transmembrane pathway
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95 Which of the following statement(s)
is/are true?
This question has multiple correct options
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 movements 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.
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96 Guttation is due to
A. Negative root pressure
B. Positive root pressure
C. Transpiration
D. None of the above
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97 Which plant is used for demonstrating plasmolysis in the laboratory?
A. Tropaeolum
B. Impatiens balsam
c. Tradescantia
D. All of the above
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98 Osmosis and diffusion differs, that
osmosis is one way traffic and diffusion
is a two -way traffic
A. True
B. False
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99 Which statement is incorrect for ion-
channels?
A. They are protein
B. Movement through them is simple diffusion
C. Movement through them is from high to low concentration
D. All ions pass through the same type of channel
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100 Observe the diagram carefully and answer the following.
a) Name the type of transport.
b) Define the process.
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101 Water absorption through roots can be increased by keeping the plants
A. In the shade
B. In dim light
c. under the fan
D. Covered with a polythene bag
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102 Which of the following processes takes place in the presence of ATP?
I. Diffusion
Il. Active transport
III. Facilitated diffusion
A. I only
B. II only
c. ॥ only
D. I and III
E. Il and III
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103 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?
A. Water stress
B. Atmospheric pressure
c. Root pressure
D. Transpiration
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104 Which of the following occurs due to the stomatal opening?
I. Increased photosynthesis
II. Increased transpiration
III.Decreased chlorophyl
A. I only
B. II only
c. ॥ only
D. I and II only
E . I, II and III only
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105 Root pressure is measured by
A. Manometer
B. Potometer
c. Auxanometer
D. osmometer
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106 Channel proteins allow ions that would not normally pass through the cell membrane to go through the channel What properties of the proteins are responsible for this?
A. The channels are often composed of charged or polar ( R ) groups.
B. The channels are often composed of hydrophobic ( R ) group
( c . a ) and ( b )
D. None of these
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107 Choose the correct answers from the
alternatives given Water and minerals that cross the
cortex through the symplast move
A. Extracellularly along the matrix of cell walls
B. From cell to cell through plasmodesmata
c. By active transport
D. By pressure flow
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108 The condition under which
transpiration would be most rapid
A. High humidity
B. Excess of water in soil
C. Low humidity, high temperature, guard cells are turgid (open) and moist soil
D. Low velocity of wind
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109 Leaf photosynthates are transported to other parts of higher plants through
A. Cambium
B. Pith
c. xylem
D. Phloem
11
110 Which pathway involves cell wall and
intercellular spaces both?
A. Vascular pathway
B. Protoplast pathway
c. symplast pathway
D. Apoplast pathway
11
111 Sap ascents in woody stems because of
A. Transpiration pull
B. Capillarity
c. Molecular adhesion
D. Photosynthesis
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112 Bidirectional translocation of materials
takes place in
A. Xylem
B. Phloem
c. Parenchyma
D. Cambium
11
113 By many evidences, it can be known
that the downward movement of food
takes place through
A. Phloem
B. Xylem
c. collenchyma
D. Sclerenchyma
11
114 A plant is transpiring rapidly. Will it
show root pressure also?
11
115 Stomatal index I is equal to
A ( cdot frac{s}{E-S} )
B. ( frac{s}{E+s} )
( mathbf{c} cdot frac{E}{E+S} )
D. ( frac{E+S}{E} )
11
116 Foliar transpiration
A. Includes stomata and cuticular transpiration
B. Does not occur
C. Includes all type of transpiration
D. Shows stomatal transpiration
11
117 Movement of molecule of gases, liquids and solids from a region of higher concentration to a region of lower concentration is termed as
A. Diffusion
B. Evaporation
c. Transpiration
D. Osmosis
11
118 The process by which large molecule move out of a cell is called as
A. Plasmolysis
B. Deplasmolysis
c. Phagocytosis
D. Reverse phagocytosis
11
119 Apoplastic movement of water occurs exclusively through the
(i) Intercellular spaces
(ii) Walls of the cells
(iii) Plasmodesmata
(iv) Cytoplasm
A . i, ii and iv
B. iii and iv
D. ii and ì
E. iv
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120 Water in adjacent xylem moves into the phloem by process of :
A. Simple diffusion
B. Active transport
c. osmosis
D. Facilitated diffusion
11
121 Which of the tissue is more important for translocation of sucrose?
A. Xylem
B. Phloem
c. Both of the above
D. None of the above
11
122 When stem of a herbaceous plant is cut water or sap oozes out, this is due to?
A. Guttation
B. Transpiration pull
c. Root pressure
D. Imbibition
11
123 During phloem transportation sugar is moved in form of sucrose in to the
companion cells and them into the
living phloem sieve tube cells by
A. Passive transport
B. Active transport
c. Facilitated diffusion
D. Osmosis
11
124 The apoplast is located
A. Outside the plasma membrane
B. In the entire cytosol
C. On both sides of plasma mebrane
D. In the plastidial content
11
125 Active transport of ions by the cell
requires
A. High temperature
B. ATP
c. Alkaline pH
D. Salts
11
126 In plants the translocation of organic solutes take place through
A. Epidermis
B. Xylem
c. Phloem
D. Pith
11
127 Differentiate between passive transport and active transport. 11
128 What is the function of P-protein?
A. To carry out photosynthesis in leaves
B. To carry out transport of organic solutes through phloem
c. Passive protein present in phaseolus seeds
D. The protein of pollen grains
11
129 Which of these is not directly connected with ascent of sap?
A. Cohesion theory
B. Root pressure
c. Apoplast and symplast
D. Capillarity
11
130 The most widely accepted theory for
ascent of sap in trees is
A . Capillarity
B. Role of atmospheric pressure
C. Pulsating action of living cell
D. Transpiration pull and cohesion theory of Dixon and Joly
11
131 Which of the following shows that metabolic energy is required in the absorption of ions
A. More ions absorption in presence of oxygen
B. Less absorption of ions in presence of oxygen
C. More ions absorption in presence of ATP
D. More ions absorption in presence of NAD
11
132 Carrier proteins are involved in the
A. Active transport of ions
B. Passive transport of ions
c. water transport
D. Both A and B
11
133 Active transport occurs
A. Against concentration gradient and requires ATP
B. Against concentration gradient but does not require ATP
C. Along concentration gradient but requires ATP
D. Along concentration gradient but does not require ATP
11
134 Aquaporins are integral proteins of the plasma membrane whose role is to
allow the passage of water molecules
down its concentration gradient. Recent observations have shown an
interesting arrangement of charged amino acid residues along the inner
surface of the channel resulting in the entry of water via its oxygen, then flipping to lead with its hydrogens half way through the channel. How might this explain aquaporins specificity for water and not cations or protons?
A. Cations such as ( K^{+} ) and ( N a^{+} ) would be repelled at the opening of the channel
B. Water gains access because it is electrically neutral.
c. Protons cannot cross since they do not interact with water
D. Water, being a small polar molecule, is able to interact with both negative and positive residues in the channel.
11
135 Choose the correct answer from the
alternatives given. Active transport from outside to inside
of molecules across a membrane
requires:
A. cyclic AMP
B. acetyl chlorine
c. Атр
D. lecithin
11
136 Force generated by transpiration can create pressure to lift water upto
A. 130 feet
B. 130 metres
c. 230 feet
D. 230 metres
11
137 Cotton fibres dipped in water absorb water through
A. Endosmosis
B. Exosmosis
c. capillarity
D. Imbibition
11
138 Waste product produced during respiration in plant are
A. ( C O_{2} )
B. Water
c. oxygen
D. Both A and B
11
139 Explain what will happen to a plant cell, if it is kept in a solution having higher water potential. 11
140 Choose the correct answer from the
alternatives given
Minerals enter a plant mainly by:
A. diffusion
B. pressure flow
c. translocation
D. active transportt
11
141 The conduction of water from root hair
to root xylem is
A. Symplastic
B. Apoplastic
c. osmotically
D. Symplastic and apoplastic
11
142 Which of the following is an energy dependent process?
A. Facilitated diffusion
B. Active transportt
c. Endosmosis
D. Exosmosis
11
143 Assertion
During apoplastic movement of water,
water travels through the cells and their
cytoplasm.
Reason
The symplastic movement of water
occurs exclusively through the
intercellular spaces and the walls of the cells.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
144 The food stored in the ripening fruit is derived from
A . Roots
B. Farthest leaves
c. Nearest leaves
D. Aerial stem
11
145 Active transport across biomembrane
involves
A. Production of ATP
B. Requirement of energy
c. Production of toxin
D. Release of energy
11
146 The diagrams given below represent the relationship between a mouse and a
physiological process that occurs in
green plants. Study the diagrams and answer the questions that follow:
Why did the mouse die in bell jar ( B ) ?
11
147 Munch hypothesis is based on
A. Translocation of food due to turgor pressure (TP) gradient and imbibition force
B. Translocation of food due to turgor pressure (TP) gradient
C. Translocation of food due to imbibition force
D. None of the above
11
148 Which of the following is not a controlled process?
A. Transpiration
B. Guttation
c. Both A and B
D. None of the above
11
149 ( N a^{+} / K^{+} ) pump in a cell is an example
of
A. Osmosis
B. Diffusion
c. Passive transport
D. Active transport
11
150 Water rises in the stem due to
A. Cohesion and transpiration pull
B. Turgor pressure
c. osmotic pressure
D. None of the above
11
151 Cohesion-tension theory is related to
A. Respiration
B. Ascent of sap
c. Transpiration
D. Photosynthesis
11
152 Cohesion-tension theory regading ascent of sap was given by
A. Dixon and Jolly
B. J.C. Bose
c. christian Wolf
D. Godlewski
11
153 By which of the following active uptake
of water is affected?
A. Transpiration power of the root hairs
B. Typical tissue organization
C. Tension due to transpiration
D. Osmotic concentration of the cell sap of the leaves
11
154 Which condition favors guttation?
A. High humidity
B. Low humidity
c. More transpiration
D. Bright sunlight
11
155 Correct pathway of water movement in
plant roots is
A. Soil water ( longrightarrow ) Root hair cell ( longrightarrow ) Passage cells ( longrightarrow ) Cortical cells ( longrightarrow ) Xylem ( longrightarrow ) Pericycle
B. Soil water ( longrightarrow ) Root hair cell ( longrightarrow ) Pericycle ( longrightarrow ) Cortical cells ( longrightarrow ) Passage cells ( longrightarrow ) Xylem
C. Soil water ( longrightarrow ) Root hair cell ( longrightarrow ) Cortical cells ( longrightarrow ) Passage cells ( longrightarrow ) Pericycle ( longrightarrow ) Xylem
D. Soil water ( longrightarrow ) Root hair cell ( longrightarrow ) Cortical cells ( longrightarrow )
Pericycle ( longrightarrow ) Passage cells ( longrightarrow ) Xylem
11
156 Mass flow hypothesis was first described by
A. Swanson
B. Buchman
c. Kursanov
D. Munch
11
157 Assertion
Diffusion is a passive type of transport.
Reason
Osmosis is an active process of
membrane transport.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
158 Which pressure is responsible for
ascent of sap?
A. Negative hydrostatic pressure
B. Positive hydrostatic pressure
c. Root pressure
D. All of the above
11
159 Upward movement of water through xylem is best explained by
A. Cohesion tension theory
B. Pulsation theory
c. capillarity theory
D. Root pressure theory
11
160 Leaves of Nelumbo plant are
A. Epistomatic
B. Hypostomatic
c. Amphistomatic
D. None of the above
11
161 Osmotic pressure of a solution is
A. Greater than pure solvent
B. Less than pure solvent
C . Equal to pure solvent
D. Less than or greater than pure solvent
11
162 Which of the following is not a purpose
of transpiration?
A. Supplies water for photosynthesis
B. Helps in translocation of sugar from source to sink
C. Maintain shape and structure of the plant
D. Transport minerals from the soil to all parts of the plant
11
163 A cell placed in a strong salt solution will shrink because
A. Mineral salts will break the cell wall
B. Salt water will enter the cell
c. water comes out by exosmosis
D. cytoplasm will decompose
11
164 According to carrier concept, the transport of ions across the membrane
is
A. Passive process
B. Active process
c. osmotic proces
D. None of the above
11
165 Carrier concept proposed by Honert
(1937) is related with
A. Passive absorption of water
B. Active absorption of ions
c. Passive absorption of ions
D. Active absorption of water
11
166 The continuity of water column in xylem is maintained due to
A. Presence of air bubbles
B. Cohesive property of water
c. Evaporation power of water
D. None of the above
11
167 Transpiration and root pressure cause water to rise in plants by
A. Pushing it upward
B. Pushing and pulling it respectively
c. Pulling it upward
D. Pulling and pushing it respectively
11
168 Which of the following seeds develops a greater imbibition pressure?
A. Wheat seed
B. Gram seed
c. Rice seed
D. Mustard oil seed
11
169 Absorption of mineral elements from
the soil occurs through
A. Diffusion
B. Active transportt
c. osmosis
D. All of the above
11
170 Which of the following statement is
correct?
A. Cell membrane is involved only in exosmosis
B. Cell membrane is involved only in endosmosis.
c. Cell membrane is involved both in exosmosis and endosmosis
D. None of the above.
11
171 Exudation of xylem sap on cutting of a shoot is due to
A. Gutttation
B. Root pressure
c. Transpiration
D. None of the above
11
172 Energy dependent absorption of water against osmotic gradient is
A. Active absorption
B. Passive absorption
c. Imbibition
D. Bulk absorption
11
173 In which condition plant cell become
flacid?
11
174 Transporting pull arise mainly from
A. Roots
B. Leaves
c. Stems
D. All
11
175 Ascent of sap is due to which of the following force?
A. Imbibition
B. Cellular force
c. cohesive force
D. Atmospheric pressure
11
176 dentify i, ii and iii.
A. i-uniport, ii-Antiport, iii-symport
B. i-uniport, ii-symport, iii-Antiport
C. i-Antiport, ii-symport, iii-uniport
D. i-symport, ii-uniport, iii-Antiport
11
177 Due to low atmospheric pressure, the rate of transpiration will
A. Decrease slowly
B. Decrease rapidly
c. Increase
D. Remain unaffected
11
178 Describe the mass flow hypothesis for translocation of organic solutes (food) in plants. What is the major criticism against this hypothesis? 11
179 Who had proposed theory of cohesion and adhesion forces?
A. Dixon and Jolly (1894)
B. Dixon and Benson (1885)
C. Dixon and Jolly (1950)
D. sir Jagdish Chandra Bose (1850)
11
180 Arrange the following in ascending order based on their solute
concentration
( begin{array}{ll}text { Water } & text { Pressure Potential } \ text { Cell } & begin{array}{l}text { Potential } \ (mathrm{KPa})end{array} & (mathrm{KPa}) \ & end{array} ) ( begin{array}{lll}text { (a) } & -590 & 320 \ text { (b) } & -368 & 623 \ text { (c) } & -292 & 412 \ text { (d) } & -481 & 146end{array} )
( A )
( a, a, d, b )
B. ( mathrm{d}, mathrm{c}, mathrm{a}, mathrm{b} )
( c cdot a, c, b, d )
( D cdot b, a, c, d )
11
181 Which of the following does not appear
to involve active transport across
membrane?
A. the movement of mineral nutrients from the apoplast to the symplast
B. the movement of sugar from mesophyll cells into sieve-tube members in corn
c. the movement of sugar from one sieve-tube member to the next
D. ( K^{+} ) uptake by guard cells during stomatal opening
11
182 If cohesion-tension transpiration pul theory is correct, a break in water column should
A. Increase water content of leaves
B. Increase rate of photosynthesis
c. cause wilting of leaves
D. Have no effect at all
11
183 From epithem hydathodes, the water
comes out due to
A. Imibibition pressure
B. Osmotic pressure
c. Root pressure
D. All of the above
11
184 Apoplast is the system of adjacent cell walls that is continuous throughout the plant except at the
A. Plasmodesmata
B. Vessel element
c. casparian strips of endodermis
D. Tracheids
11
185 ( N a+K^{+} ) pump represents
A. Active transport
B. Passive transport
c. osmosis
D. simple diffusion
11
186 Choose the correct answers from the
alternatives given
Exudation
A. Takes place during positive root pressure
B. Takes place during negative root pressure
c. Is unrelated with root pressure
D. Is related with photosynthesis
11
187 Apoplast movement of water occurs
A. Through cell wall
B. Through plasma membrane
C. Through cytoplasm
D. Through middle lamella only
11
188 Which of the following is correct about
symplast?
A. Living continuum
B. Cell wall and intercellular space
c. Non-Living continuum
D. None of these
11
189 Due to plasmoysis, the plant cell
A. Bursts
B. Swells up
c. Become turgid
D. Become flaccid
11
190 One of the most abundant extracellular
ions that represents about ( 90 % ) is
A. Chloride
B. Sodium
c. Calcium
D. Potassium
11
191 Sap ascends in woody stem, because of
A. Transpiration pull
B. Capillarity
c. Molecular adhesion
D. Photosynthesis
11
192 A flowering plant is planted in an earthen pot and irrigated. Urea is added
in high amounts to make the plant grow faster, but after some time the plant died. This may be due to
A. Exosmosis
B. Endosmosis
c. water logging
D. Suffocation
11
193 ABA closes stomata, but which of the
following hormone encourage them to open?
A . Gibberellic acid
B. Auxin
c. cytokinin
D. Ethylene
11
194 Guard cells are found in
A. Stomata
B. Root tips
c. Ovary
D. Lenticels
11
195 Faciliated diffusion
A. Doesn’t involves permease and doesn’t require energy
B. Involves a permease but does not require energy
C. Require energy but does not involves a permease
D. Moves substances from a region of lower concentration to a region of higher concentration
11
196 Describe the phloem transport from
source to sink
11
197 Which of the following contributes most to transport of water from the ground to the leaves of a tall tree?
A. Breakdown of ATP
B. Cohesion of water and transpiration pull
c. Root pressure
D. Capillary rise of water in xylem
11
198 A bottle of perfume is opened in the
room opposite to you and within minutes you begin to smell the perfume. This phenomenon is a classic example of
A. Dialysis
B. Osmosis
c. Active transport
D. Diffusion
11
199 The water moving upward forms a column, which is maintained up to a certain height due to
A. Osmosis
B. Transpiration pull
c. Translocational pool
D. Diffusion
11
200 Active transport involves the transport of molecules across a cell membrane.
In order to establish and maintain a
concentration gradient, which of the following condition is suitable?
A. Free energy is used to drive molecules back-and-forth across the transmembrane protein
B. Free energy is used to drive molecules and across a transmembrane protein against the concentration gradient.
c. No free energy is required
D. There must be an equal quantity of molecules on both sides of the membrane
11
201 Which of the following statement is wrong in root-presure concept of ascent of sap?
A. Water can be raised to a height of ( 6^{prime}-7 ) ‘.
B. Water moves upward in the absence of shoot.
c. water moves by this force is slow.
D. Root pressure operates in all the plants
11
202 One molar solution of which substance
will have maximum O.P?
A. Nacı
B. Glucose
c. Fructose
D. starch
11
203 The transportation of food in phloem is
A. Basipetal
B. Acropetal
c. Both A and B
D. None of the above
11
204 The number of stomata present per ( c m^{2} )
of leaf is
A. Less than 100
B. 1000 to 60000
c. one million
D. None of the above
11
205 The cells surrounding the stomatal pore
are
A. Gurad cells
B. Subsidiary cell
c. chromophil cells
D. None of the above
11
206 Choose the correct answers from the
alternatives given :
The osmotic pressure of pure water is
( A cdot O )
B. 0.1
( c )
D. 10
11
207 The movement of free atoms from
higher concentration to lower
concentration is called:
A. Osmosis
B. Diffusion
c. Endosmosis
D. Exosmosis
11
208 Apoplastic movement of water in plants
occurs on the outer side of
A. Casparian strips
B. Plasma membrane
c. Plasmodesmata
D. None of the above
11
209 Guttation is dependent on
A. Root pressure
B. Active absorption
C. Flaccidity of root cortical cells
D. High rate of transpiration
11
210 Choose the correct answer from the
alternatives given. Which of the following processes requires the greatest expenditure of energy by the cell?
A . Facilitated diffusion
B. Diffusion
c. Active transport
D. Osmosis
11
211 The best vital force theory was proposed
by
A . Godlewski
B. Strasburger
c. Dixon
D. Esau
11
212 Guttation occurs through the
A. Roots
B. Hydathode.
c. Trichome
D. Stomata.
11
213 State whether the following statements
are true or false.

Carrier proteins are necessary for active transport to occur.
A. True
B. False

11
214 The most important force which pulls the water in trees in
A. Cohesive force
B. Electromagnetic force
c. Imbibition force
D. osmotic force
11
215 Phloem loading is
A. Translocation of starch in high concentration in sieve tubes
B. Translocation of raffinose along with only solvents through sieve tubes by apoplastic operation
C. Presence of solutes in sieve tubes without any turgor
pressure
D. Symplastic operation transporting raffinose or stachyose in addition to sucrose
11
216 Generally stomata found on the lower surface of leaf. Thus, approximate percentage of transpiration through abaxial surface is
A . 47 %
в. 57%
c. 67 %
D. 97%
11
217 Define osmosis. 11
218 Assertion
The water molecules are held together
from root cells to the vascular bundle
because of cohesive force.
Reason
Water does not ascend in the plant because of transpiration pull.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
219 Passive water absorption by root system is due to
A. Force created in roots
B. Osmotic force In shoot
c. High respiratory activity of root
D. Tension in sap due to transpiration
11
220 Q Type your question
Which out of the following statements
is incorrect regarding this?
( =sqrt{3} )
( =11 )
A. A continuous high osmotic concentration is maintained in region ( mathrm{P} ), which loads a sieve tube element by passively transporting solute molecules into it
B. R shows the movement of ( H_{2} O ) into sieve tube
elements from nearby xylem vessels by osmosis
C. Translocation of organic solutes take place from region P with high turgor pressure to region Q with low turgor pressure
D. In region ( Q ), material is either consumed or is converted into insoluble storage forms resulting in decreased osmotic pressure
11
221 Active transport? 11
222 In higher plants, continuity of
cytoplasm from one cell to its neighboring cells is established through the
A. Apoplast
B. Chloroplast
c. Leucoplast
D. symplast
11
223 Mass flow hypothesis was put forward
by
A. Swanson
B. Munch
c. curtis
D. De Vries.
11
224 In hot summer day, plant cooling is due
to
A. Loss of water vapours from leaf
B. Transport of water in plant
c. Loss of liquid water
D. Loss of water from entire plant
11
225 Energy is required for
A. Active transport
B. Facilitated transport
C. Diffusion
D. All of these
11
226 Root pressure is measured by
A. Potometer
B. Barometer
c. Manometer
D. Auxanometer
11
227 Stomata are not found in
A . Algae
B. Mosses
c. Ferns
D. Liverworts
11
228 Symplastic movement of water takes place through
A. cell wall
B. plasmodesmata
c. endodermis
D. casparian strip
11
229 During day period, ………… and ………. helps in the upward movement of sap from roots to the leaves.
A. Reverse osmosis and diffusion
B. Facilitated diffusion and osmosis
c. cohesive force and transpiration pull
D. None of the above
11
230 In the process of plasmolysis
A. Endosmosis occurs
B. Exosmosis occurs
c. Imbibition occurs
D. Diffusion occurs
11
231 Most widely accepted theory of carbohydrate translocation is
A. Mass flow theory
B. Root pressure theory
c. Imbibition theory
D. Transpiration theory
11
232 The force with which water molecules
are held together in xylem is
A. Imbibition pressure
B. Osmotic pressure
c. Adhesion force
D. cohesion force
11
233 Loading of phloem is related to
A. Increase of sugar concentration in phloem.
B. Elongation of phloem cell.
C. Separation of phloem parenchyma.
D. Strengthening of phloem fiber.
11
234 In the active absorption, movement of
water is through
A. Symplast
B. Free spaces
c. Apoplast
D. All of the above
11
235 Choose the correct answer from the
alternatives given

Sugars and amino acids are carried
into the cell by the sodium- potassium pump by means of
A. Facilitated transport
B. Active transport
c. simple diffusion
D. Endocytosis

11
236 The ( N a^{+} / K^{+} ) pump is present in the plasma membrane of mammalian cells
where it.
A. Expels potassium from the cell
B. Expels sodium and potassium from the cell
c. Pumps sodium into the cell
D. Expels sodium from the cell
11
237 Which of the following processes keeps the plant cool?
A. Photosynthesis
B. Transpiration
c. Respiration
D. Translocation
11
238 Active transport
A. Releases energy
B. Requires energy
C. Produces ATP
D. Produces a toxic substance
11
239 Match and find the correct combination
( mathbf{A} )
( A-4, B-3, C-2, D-1 )
B. ( A-3, B-4, C-1, D-2 )
C ( cdot A-4, B-2, C-1, D-3 )
D. ( A-1, B-2, C-4, D-3 )
11
240 Define symport and antiport. 11
241 Root pressure is a
A. Pulling force
B. Pushing force
C. Both A and B
D. None of these
11
242 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 early morning
D. Guttation is of universal occurrence
11
243 Translocation of food in higher plants is related to the idea of
A. Source and ( operatorname{sink} )
B. Ascent of sap
c. Diffusion
D. Cyclosis
11
244 Which of the following explains bidirectional transport of solutes in phloem tissue
A. Mass flow hypothesis
B. Transcellular strands hypothesis
c. Electro-osmotic hypothesis
D. All of these
11
245 Choose the correct answers from the
alternatives given. An example of selectively permeable membrane is
A. Plasmalemma
B. Cell wall
c. chloroplast membrane
D. Mitochondrial membrane
11
246 Which of the following is not a function of transpiration?
A. Excretion of minerals
B. Cooling of leaves
c. Uptake of water
D. Uptake of minerals
11
247 On a hot summer day cooling of the
plant occurs due to
A. Loss of water vapours from leaf
B. Transport of water in plant
c. Loss of liquid water
D. Loss of water from entire plant
11
248 J.C. Bose proposed this theory to explain the process of ascent of sap
A. Relay-pump theory
B. Transpiration pull theory
c. Pulsatory theory
D. Capillary force theory
11
249 Which statement is not true?
A. The casparian strips prevent water from moving.
B. The endodermis is a cell layer in the cortex.
C. The symplast is a meshwork consisting of the (connected) living cells.
D. Water can enter the stele without entering the symplast.
11
250 Chemical analysis of phloem shows the presence of
A. More amount of carbohydrates
B. organic nitrogenous compounds
c. Minerals
D. Both A and B
11
251 Imbibition is a
A. Property of solvent
B. Capillary phenomenon
C. Protoplasmic phenomenon
D. Property of solutes
11
252 Who defined the term root pressure?
A. Stephan Hales
B. Mendel
c. Griffith
D. Godiewski
11
253 Define:
(i) Radial vascular bundle
(ii) Rigor mortis
(iii) Root pressure
11
254 Root pressure is due to
A. Passive transport
B. Gravitation
c. Active transport
D. None of the above
11
255 Water will be absorbed by root hair
when the
A. Concentration of solutes in the cell sap is high.
B. Plant is rapidly respiring.
C. They are separated from soil by permeable membrane.
D. Concentration of salts in the soil is high.
11
256 The diffusion of water vapours through aerial parts of the plants is called as
A. Osmosis
B. DPD
c. Transpiration
D. All of the above
11
257 Force responsible for exudation of liquid
drops from the margin of the leaves is
A. Negative hydrostatic
B. Transpiration pull
c. Imbibition
D. Positive pressure
11
258 Guttation occurs through
A. Hydathodes
B. Lenticels
c. cuticle
D. None of these
11
259 At mid day hours, the xylem sap is in
state of
A. compression
B. Tension
c. Relaxation
D. Adhesion
11
260 Assertion
Wilting occurs due to loss in turgidity
Reason

Turgor pressure checks the excessive
entry of water into cells
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is
not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect

11
261 The number of stomatal and epidermal
in 1 m area of leaves of ( A, B, C, D )
plants are given below.
Is begin{tabular}{lll}
Plant & Number of Stomatal & Number of epidermal cells \
hline ( mathrm{A} ) & 40 & 730 \
( mathrm{B} ) & 60 & 510 \
( mathrm{C} ) & 70 & 450 \
( mathrm{D} ) & 30 & 620
end{tabular}
Identify the two plants having least stomatal index.
( A cdot A, D )
B. A, C
( c cdot A, B )
D. B, C
11
262 Active transport of ions by a cell requires
A. High temperature
B. Low temperature
c. Alkaline ph
D. ATP
11
263 When epidermal peeling of Tradescantia is placed in a strong sugar solution and the cell
content contract away from the cell wall This phenomenon is called as
A. Hydrolysis
B. Plasmolysis
c. Deplasmolysis
D. None of the above
11
264 Which is used to measure the rate of
transpiration?
A. Atmometer
B. Psychrometer
c. Potometer
D. Porometer
11
265 Which of the following is true/false regarding transport of substances in plants?
(i) Mass flow is the movement of
substance in bulk as a result of
pressure difference.
(ii) Bulk flow is achieved only through a positive hydrostatic pressure gradient.
(iii) The apoplast system is the system of interconnected protoplasts.
(iv) Most of the water flow in the roots
occurs via the apoplast since the cortical cells are loosely packed, and offer no resistance to water movement.
A . (i) and (iv) are true; (ii) and (iii) are false
B. (i) and (ii) are true; (iii) and (iv) are false
( c . ) (ii) and
(iii) are true; (i) and (iv) are false
D. (i), (ii) and (iv) are true; (iii) is false
11
266 In root apoplast path of water transport; the water is transported through
A. cell wall only
B. Cell wall and inter cellular spaces
c. Intercellular spaces
D. Intercellular spaces, cell walls and endodermis
11
267 Processes occur in leaves, which may lower their temperature is
A. Respiration
B. Photosynthesis
c. Hydrolysis
D. Transpiration
11
268 Root pressure can be measured by
A. Attaching a barometer to the cut end of the stem
B. Attaching a manometer to the cut end of the stem
C. Attaching a thermometer to the cut end of the stem
D. Attaching a potometer to the cut end of the stem.
11
269 Density of vitreous humour is equal to the?
A. Air
B. water
c. Lens
D. None of these
11
270 The Casparian strips of root endoderm contain a mixture of
A. Cellulose and cutin
B. Cellulose and lignin
c. Lignin and suberin
D. Cellulose and suberin
11
271 Match the theories given with the names of scientists. Choose the answer
which gives the correct combination of
the alphabets.
Names of Names of theories ( quad ) scientists
A. Relay pump theory
p. Schleiden
B. Cohesion tension theory
q. Sir J.C. Bose
C. Mass flow theory Godlewski
D. Pulsation theory
s. Dixon and Jolly
t. Ernst Munch
A ( cdot ) A- ( q, ) B- ( p, C-t, D-r )
B. A-r, B- q, C- t, D- q
c. ( A-s, B-r, C-p, D-q )
D. A- r, B- s, C- t, D- q
11
272 Root pressure does not take an active part in the ascent of sap because
A. It is not found in all the plants and water can rise in the absence of root
B. It is seen during most favourable periods like spring or rainy season.
c. It is never found to exist in the plants
D. Both A and B
11
273 The process of guttation takes place
A. When the root pressure is high and the rate of transpiration is low
B. When the root pressure is low and the rate of transpiration is high
C. When the root pressure equals the rate of transpiration
D. When the root pressure as well as rate of transpiration are high
11
274 Water drops present on leaf margins of Tropaeolum, Balsam and grasses in early morning are due to
A. Guttation
B. Dew
c. osmosis
D. Transpiration
11
275 The spray of PMA causes
A. Decrease in transpiration
B. Increase in transpiration
C. Increase in absorption
D. Increase in guttation
11
276 Carrier protein helps in
A. Transport of ions across the membrane
B. Passive ions absorption
C. Water absorption
D. Vaporization
11
277 In which one of the followings, expenditure of energy is required?
A. Osmosis
B. Diffusion
c. Active transport
D. Passive transport
11
278 Describe the mechanism of mineral
absorption by ion-exchange method.
11
279 What is root pressure? 11
280 The factor or process which best explain the rise of water from roots ( (100 mathrm{mts}) ) to
the top of tree is
A. Break down of ATP
B. Root pressure
c. capillary rise of water in xylem
D. cohesion of water and transpiration pull
11
281 The phenomenon related to active water absorption is
A. Transpiration
B. Root pressure
c. osmotic pressure
D. Translocation
11
282 Differentiate between
Water potential and diffusion pressure deficit.
11
283 What are apoplast and symplast? 11
284 ATP molecules combine with carrier
molecules and allow passage of
substances.
A. Along concentration gradient
B. Against concentration gradient
c. Both A and B
D. ATP is not required
11
285 The cause of guttation is mainly due to
A. Root pressure
B. Osmosis
c. Transpiration pull
D. cohesive force
11

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