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.

Transport In Plants Questions

List of transport in plants Questions

Question NoQuestionsClass
1Set up an experiment to demonstrate
root pressure.
11
2Root 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.
11
3Select 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
11
4In plant relations, ( Psi ) indicates
A. DPD
B. Solute potential
c. water potential
D. Suction pressure
11
5Translocation 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
11
6Which 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
11
7Force 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.
11
8Active transport across cell membrane
requires
A. Glucose
B. Steroids
c. Energy in the form ATP
D. Proteins and glucose
11
9Salt is added to preserve meat, pickles, etc. because salting kills bacteria by the process of
A. Dissolution
B. Distillation
c. Plasmolysis
D. Imbibition
11
10Dry seeds when placed in water swell up
due to
A. Imbibition
B. Absorption
c. Diffusion
D. Adsorption
11
11The 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
11
12lon uptake is called active because
A. Ions are active
B. Energy is expended
c. lons move freely
D. Ions move passively
11
13The 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
11
14A 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.
11
15Root pressure can be demonstrated by means of
A. Wilting
B. Guttation
c. Transpiration
D. Exudation/bleeding
11
16In maize, sugar, beet etc., the translocation of carbohydrate is
A. Apolar
B. Polar
c. Basipetal
D. None of the above
11
17An 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
11
18The 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
11
19Choose 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
11
20Wilting of plant is present in
A. Moss
B. Fern
c. Algae
D. Gymnosperm
11
21Water potential in the leaf tissue is positive (+ve) during
A. Excessive transpiration
B. Low absorption
c. Low transpiration
D. Guttation
11
22A living continuum of cells connected by plasmodesmata is
A. Dermal tissue
B. Ground complex
c. Donnan free space
D. symplast
11
23Root 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
11
24For transport of food in plants it requires
A. ATP and phloem
B. ADP and phloem
c. ATP and xylem
D. ADP and xylem
11
25Which 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
11
26Briefly explain how transpiration helps in upward conduction of water in plants?
( (a) )
( (b) )
11
27Which 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
11
28Organic substances such as sugars are translocated in phloem can be demonstrated by
A. Defoliation
B. Girdling the stem
c. Grafting
D. Root pressure
11
29In 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.
11
30What is the direction of movement of
sugar in phloem?
A. Non-multidirectional
c. Downward
D. Bi-directional
11
31Stomata open and close due to
A. Turgor pressure change
B. Hormonal change.
c. Temperature change
D. All of the above.
11
32Translocation of organic materials is best explained by
A. Active transport
B. Transpiration pull
c. Imbition theory
D. Mass flow hypothesis
11
33The 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
11
34Which 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.
11
35Active uptake of minerals by root mainly depends on the
A. Availability of oxygen
B. Light
c. Temperature
D. Availability of carbon dioxide
11
36What 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
11
37What 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
11
38In tall plants, because of which factor,
continuous water column extends
upward?
A. Atmospheric pressure
B. Osmotic pressure
c. suction pull
D. Root pressure
11
39Osmosis 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.
11
40Uphill 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
11
41Choose the correct answers from the
alternatives given

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

11
42According 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
11
43Compare the imbibing capacities of pea
and wheat seeds.
11
44Terms apoplast and symplast were first
used by
A. Clark
B. Munch
c. Dixon
D. Lundegardh
11
45The breathing organ in the plant is
A. Lungs.
B. Stomata.
c. Gills
D. Seeds
11
46Water rises in the stem due to
A. Cohesion and transpiration pull
B. Turgor pressure
c. osmotic pressure
D. None of the above
11
47Theory 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
11
48Osmotic theory for an active absorption
of water was given by
A. Thimann
B. O. Hertwig
c. Atkins and Priestley
D. J. C. Bose
11
49Sieve 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
11
50The transport system in plants is made
up of
A. Xylem
B. Vascular tissues
c. Phloem
D. None of the above
11
51The 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
11
52Mark 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
11
53In mesophytes, maximum transpiration
occurs through
A. Cuticle
B. Lenticel
c. Stomata
D. Hydathodes
11
54The 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
11
55The highest value of ( Psi )
is
( mathbf{A} cdot mathbf{1} )
B.
c. 10
D. 100
11
56Medicinal plant harvested from wild for anticancer compound is
A. Taxus baccata
B. Datura stramonium
c. Rauwolfia serpentina
D. Ocimum sanctum
11
57What is transpiration? Where does it
occur?
11
58Which tissue are removed when a plant
is girdled?
A. Xylem and pith
B. Xylem and phloem
c. Phloem to epidermis
D. Phloem to pith
11
59The 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
11
60Pathway of water inside plant body after its absorption is by
A. Apoplast
B. Symplast
c. Both A and B
D. None of the above
11
61Transpiration occurs through
A. Leaves
B. Stem
c. Roots
D. None of the above
11
62Root 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
11
63In 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
11
64What 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
11
65Which 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
11
66Sunken stomata are found in leaves of
A. Trifolium
B. Lemna
c. Nerium
D. Lilium
11
67Water supply in the plant is due to
A. Osmosis
B. Guttation
c. cohesion force
D. Imbibition
11
68To initiate cell plasmolysis, the soution outside the cell must be
A. Isotonic
B. Hypotonic
c. Hypertonic
D. Atonic
11
69Facilitated 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.
11
70Active transport is characterised by
A. Requires special membrane proteins
B. Highly selective
c. Requires ATP energy
D. All of the above
11
71Short / 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.
11
72The 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
11
73Assertion
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.
11
74By which mechanism water is absorbed
under low transpiring conditions?
A. Osmosis
B. Active absorption
c. Both of the above
D. Passive absoprtion
11
75Which 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
11
76An 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?

11
77Glucose, 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
11
78The 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
11
79Root pressure is measured by
A. Potometer
B. Barometer
c. Manometer
D. Auxanometer
11
80Differentiate between
Hygroscopic Water and capillary Water
11
81Active and passive absorption terms
were coined by
A. Kramer
B. Deutrochet
c. Priestley
D. Renner
11
82Choose 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

11
83Which 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
11
84Which one keeps its stomata open during night and closed during day?
A. cactus
B. Water lily
( c . ) Ivy
D. Hibiscus
11
85Leaves of submerged hydrophytes are
A. Epistomatic
B. Hypostomatic
c. Astomatic
D. Both A and B
11
86Transpiration increases with increase
in
A. Humidity
B. Temperature
c. Minerals
D. Soil moisture
11
87Assertion
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
11
88The pathway which water moves through cell wall without crossing any membrane
A. apoplast pathway
B. symplast pathway
c. vacuolar pathway
D. transmembrane pathway
11
89Imbibition involves
A . Solute potential
B. Gravity potential
c. Matric potential
D. Pressure potential
11
90Mass-flow hypothesis is also known as
A. Pressure flow hypothesis
B. Accelerated diffusion theory
c. conventional flow hypothesis
D. None of the above
11
91Starch 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
11
92Which 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
93The force of cohesion tension exceeds
root pressure on a
A. Rainy day
B. Foggy morning
c. sunny day
D. Full moon night
11
94In 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
11
95Which 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.
11
96Guttation is due to
A. Negative root pressure
B. Positive root pressure
C. Transpiration
D. None of the above
11
97Which plant is used for demonstrating plasmolysis in the laboratory?
A. Tropaeolum
B. Impatiens balsam
c. Tradescantia
D. All of the above
11
98Osmosis and diffusion differs, that
osmosis is one way traffic and diffusion
is a two -way traffic
A. True
B. False
11
99Which 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
11
100Observe the diagram carefully and answer the following.
a) Name the type of transport.
b) Define the process.
11
101Water 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
11
102Which 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
11
103Choose 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
11
104Which 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
11
105Root pressure is measured by
A. Manometer
B. Potometer
c. Auxanometer
D. osmometer
11
106Channel 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
11
107Choose 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
11
108The 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
11
109Leaf photosynthates are transported to other parts of higher plants through
A. Cambium
B. Pith
c. xylem
D. Phloem
11
110Which pathway involves cell wall and
intercellular spaces both?
A. Vascular pathway
B. Protoplast pathway
c. symplast pathway
D. Apoplast pathway
11
111Sap ascents in woody stems because of
A. Transpiration pull
B. Capillarity
c. Molecular adhesion
D. Photosynthesis
11
112Bidirectional translocation of materials
takes place in
A. Xylem
B. Phloem
c. Parenchyma
D. Cambium
11
113By many evidences, it can be known
that the downward movement of food
takes place through
A. Phloem
B. Xylem
c. collenchyma
D. Sclerenchyma
11
114A plant is transpiring rapidly. Will it
show root pressure also?
11
115Stomatal 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
116Foliar transpiration
A. Includes stomata and cuticular transpiration
B. Does not occur
C. Includes all type of transpiration
D. Shows stomatal transpiration
11
117Movement 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
118The process by which large molecule move out of a cell is called as
A. Plasmolysis
B. Deplasmolysis
c. Phagocytosis
D. Reverse phagocytosis
11
119Apoplastic 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
11
120Water in adjacent xylem moves into the phloem by process of :
A. Simple diffusion
B. Active transport
c. osmosis
D. Facilitated diffusion
11
121Which 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
122When 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
123During 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
124The 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
125Active transport of ions by the cell
requires
A. High temperature
B. ATP
c. Alkaline pH
D. Salts
11
126In plants the translocation of organic solutes take place through
A. Epidermis
B. Xylem
c. Phloem
D. Pith
11
127Differentiate between passive transport and active transport.11
128What 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
129Which of these is not directly connected with ascent of sap?
A. Cohesion theory
B. Root pressure
c. Apoplast and symplast
D. Capillarity
11
130The 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
131Which 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
132Carrier proteins are involved in the
A. Active transport of ions
B. Passive transport of ions
c. water transport
D. Both A and B
11
133Active 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
134Aquaporins 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
135Choose 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
136Force generated by transpiration can create pressure to lift water upto
A. 130 feet
B. 130 metres
c. 230 feet
D. 230 metres
11
137Cotton fibres dipped in water absorb water through
A. Endosmosis
B. Exosmosis
c. capillarity
D. Imbibition
11
138Waste product produced during respiration in plant are
A. ( C O_{2} )
B. Water
c. oxygen
D. Both A and B
11
139Explain what will happen to a plant cell, if it is kept in a solution having higher water potential.11
140Choose the correct answer from the
alternatives given
Minerals enter a plant mainly by:
A. diffusion
B. pressure flow
c. translocation
D. active transportt
11
141The conduction of water from root hair
to root xylem is
A. Symplastic
B. Apoplastic
c. osmotically
D. Symplastic and apoplastic
11
142Which of the following is an energy dependent process?
A. Facilitated diffusion
B. Active transportt
c. Endosmosis
D. Exosmosis
11
143Assertion
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
144The food stored in the ripening fruit is derived from
A . Roots
B. Farthest leaves
c. Nearest leaves
D. Aerial stem
11
145Active transport across biomembrane
involves
A. Production of ATP
B. Requirement of energy
c. Production of toxin
D. Release of energy
11
146The 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
147Munch 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
148Which 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
150Water rises in the stem due to
A. Cohesion and transpiration pull
B. Turgor pressure
c. osmotic pressure
D. None of the above
11
151Cohesion-tension theory is related to
A. Respiration
B. Ascent of sap
c. Transpiration
D. Photosynthesis
11
152Cohesion-tension theory regading ascent of sap was given by
A. Dixon and Jolly
B. J.C. Bose
c. christian Wolf
D. Godlewski
11
153By 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
154Which condition favors guttation?
A. High humidity
B. Low humidity
c. More transpiration
D. Bright sunlight
11
155Correct 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
156Mass flow hypothesis was first described by
A. Swanson
B. Buchman
c. Kursanov
D. Munch
11
157Assertion
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
158Which pressure is responsible for
ascent of sap?
A. Negative hydrostatic pressure
B. Positive hydrostatic pressure
c. Root pressure
D. All of the above
11
159Upward movement of water through xylem is best explained by
A. Cohesion tension theory
B. Pulsation theory
c. capillarity theory
D. Root pressure theory
11
160Leaves of Nelumbo plant are
A. Epistomatic
B. Hypostomatic
c. Amphistomatic
D. None of the above
11
161Osmotic 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
162Which 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
163A 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
164According 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
165Carrier 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
166The 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
167Transpiration 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
168Which of the following seeds develops a greater imbibition pressure?
A. Wheat seed
B. Gram seed
c. Rice seed
D. Mustard oil seed
11
169Absorption of mineral elements from
the soil occurs through
A. Diffusion
B. Active transportt
c. osmosis
D. All of the above
11
170Which 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
171Exudation of xylem sap on cutting of a shoot is due to
A. Gutttation
B. Root pressure
c. Transpiration
D. None of the above
11
172Energy dependent absorption of water against osmotic gradient is
A. Active absorption
B. Passive absorption
c. Imbibition
D. Bulk absorption
11
173In which condition plant cell become
flacid?
11
174Transporting pull arise mainly from
A. Roots
B. Leaves
c. Stems
D. All
11
175Ascent of sap is due to which of the following force?
A. Imbibition
B. Cellular force
c. cohesive force
D. Atmospheric pressure
11
176dentify 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
177Due to low atmospheric pressure, the rate of transpiration will
A. Decrease slowly
B. Decrease rapidly
c. Increase
D. Remain unaffected
11
178Describe the mass flow hypothesis for translocation of organic solutes (food) in plants. What is the major criticism against this hypothesis?11
179Who 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
180Arrange 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
181Which 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
182If 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
183From epithem hydathodes, the water
comes out due to
A. Imibibition pressure
B. Osmotic pressure
c. Root pressure
D. All of the above
11
184Apoplast 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
186Choose 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
187Apoplast movement of water occurs
A. Through cell wall
B. Through plasma membrane
C. Through cytoplasm
D. Through middle lamella only
11
188Which 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
189Due to plasmoysis, the plant cell
A. Bursts
B. Swells up
c. Become turgid
D. Become flaccid
11
190One of the most abundant extracellular
ions that represents about ( 90 % ) is
A. Chloride
B. Sodium
c. Calcium
D. Potassium
11
191Sap ascends in woody stem, because of
A. Transpiration pull
B. Capillarity
c. Molecular adhesion
D. Photosynthesis
11
192A 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
193ABA closes stomata, but which of the
following hormone encourage them to open?
A . Gibberellic acid
B. Auxin
c. cytokinin
D. Ethylene
11
194Guard cells are found in
A. Stomata
B. Root tips
c. Ovary
D. Lenticels
11
195Faciliated 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
196Describe the phloem transport from
source to sink
11
197Which 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
198A 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
199The 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
200Active 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
201Which 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
202One molar solution of which substance
will have maximum O.P?
A. Nacı
B. Glucose
c. Fructose
D. starch
11
203The transportation of food in phloem is
A. Basipetal
B. Acropetal
c. Both A and B
D. None of the above
11
204The 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
205The cells surrounding the stomatal pore
are
A. Gurad cells
B. Subsidiary cell
c. chromophil cells
D. None of the above
11
206Choose the correct answers from the
alternatives given :
The osmotic pressure of pure water is
( A cdot O )
B. 0.1
( c )
D. 10
11
207The movement of free atoms from
higher concentration to lower
concentration is called:
A. Osmosis
B. Diffusion
c. Endosmosis
D. Exosmosis
11
208Apoplastic 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
209Guttation is dependent on
A. Root pressure
B. Active absorption
C. Flaccidity of root cortical cells
D. High rate of transpiration
11
210Choose 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
211The best vital force theory was proposed
by
A . Godlewski
B. Strasburger
c. Dixon
D. Esau
11
212Guttation occurs through the
A. Roots
B. Hydathode.
c. Trichome
D. Stomata.
11
213State whether the following statements
are true or false.

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

11
214The most important force which pulls the water in trees in
A. Cohesive force
B. Electromagnetic force
c. Imbibition force
D. osmotic force
11
215Phloem 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
216Generally 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
217Define osmosis.11
218Assertion
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
219Passive 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
220Q 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
221Active transport?11
222In 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
223Mass flow hypothesis was put forward
by
A. Swanson
B. Munch
c. curtis
D. De Vries.
11
224In 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
225Energy is required for
A. Active transport
B. Facilitated transport
C. Diffusion
D. All of these
11
226Root pressure is measured by
A. Potometer
B. Barometer
c. Manometer
D. Auxanometer
11
227Stomata are not found in
A . Algae
B. Mosses
c. Ferns
D. Liverworts
11
228Symplastic movement of water takes place through
A. cell wall
B. plasmodesmata
c. endodermis
D. casparian strip
11
229During 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
230In the process of plasmolysis
A. Endosmosis occurs
B. Exosmosis occurs
c. Imbibition occurs
D. Diffusion occurs
11
231Most widely accepted theory of carbohydrate translocation is
A. Mass flow theory
B. Root pressure theory
c. Imbibition theory
D. Transpiration theory
11
232The force with which water molecules
are held together in xylem is
A. Imbibition pressure
B. Osmotic pressure
c. Adhesion force
D. cohesion force
11
233Loading 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
234In the active absorption, movement of
water is through
A. Symplast
B. Free spaces
c. Apoplast
D. All of the above
11
235Choose 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
236The ( 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
237Which of the following processes keeps the plant cool?
A. Photosynthesis
B. Transpiration
c. Respiration
D. Translocation
11
238Active transport
A. Releases energy
B. Requires energy
C. Produces ATP
D. Produces a toxic substance
11
239Match 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
240Define symport and antiport.11
241Root pressure is a
A. Pulling force
B. Pushing force
C. Both A and B
D. None of these
11
242Which 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
243Translocation 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
244Which 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
245Choose 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
246Which 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
247On 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
248J.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
249Which 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
250Chemical analysis of phloem shows the presence of
A. More amount of carbohydrates
B. organic nitrogenous compounds
c. Minerals
D. Both A and B
11
251Imbibition is a
A. Property of solvent
B. Capillary phenomenon
C. Protoplasmic phenomenon
D. Property of solutes
11
252Who defined the term root pressure?
A. Stephan Hales
B. Mendel
c. Griffith
D. Godiewski
11
253Define:
(i) Radial vascular bundle
(ii) Rigor mortis
(iii) Root pressure
11
254Root pressure is due to
A. Passive transport
B. Gravitation
c. Active transport
D. None of the above
11
255Water 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
256The 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
257Force 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
258Guttation occurs through
A. Hydathodes
B. Lenticels
c. cuticle
D. None of these
11
259At mid day hours, the xylem sap is in
state of
A. compression
B. Tension
c. Relaxation
D. Adhesion
11
260Assertion
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
261The 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
262Active transport of ions by a cell requires
A. High temperature
B. Low temperature
c. Alkaline ph
D. ATP
11
263When 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
264Which is used to measure the rate of
transpiration?
A. Atmometer
B. Psychrometer
c. Potometer
D. Porometer
11
265Which 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
266In 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
267Processes occur in leaves, which may lower their temperature is
A. Respiration
B. Photosynthesis
c. Hydrolysis
D. Transpiration
11
268Root 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
269Density of vitreous humour is equal to the?
A. Air
B. water
c. Lens
D. None of these
11
270The 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
271Match 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
272Root 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
273The 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
274Water 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
275The spray of PMA causes
A. Decrease in transpiration
B. Increase in transpiration
C. Increase in absorption
D. Increase in guttation
11
276Carrier protein helps in
A. Transport of ions across the membrane
B. Passive ions absorption
C. Water absorption
D. Vaporization
11
277In which one of the followings, expenditure of energy is required?
A. Osmosis
B. Diffusion
c. Active transport
D. Passive transport
11
278Describe the mechanism of mineral
absorption by ion-exchange method.
11
279What is root pressure?11
280The 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
281The phenomenon related to active water absorption is
A. Transpiration
B. Root pressure
c. osmotic pressure
D. Translocation
11
282Differentiate between
Water potential and diffusion pressure deficit.
11
283What are apoplast and symplast?11
284ATP 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
285The cause of guttation is mainly due to
A. Root pressure
B. Osmosis
c. Transpiration pull
D. cohesive force
11

Hope you will like above questions on transport in plants and follow us on social network to get more knowledge with us. If you have any question or answer on above transport in plants questions, comments us in comment box.

Stay in touch. Ask Questions.
Lean on us for help, strategies and expertise.

Leave a Reply

Your email address will not be published. Required fields are marked *