CBSE Questions for Class 11 Medical Biology Transport In Plants Quiz 5 - MCQExams.com

Which phenomenon is exhibited here?

155402_a4be6bd8464d4ff888a86d546d4a89ab.png
  • Hydathode
  • Tracheids
  • Epithem cells
  • Mesophyll cell
  • Guttation
A storage organ is a part of a plant specifically modified for storage of energy generally in the form of
  • Carbohydrates
  • Water
  • Both A and B
  • None of the above
Which of the tissue is more important for translocation of sucrose?
  • Xylem
  • Phloem
  • Both of the above
  • None of the above
The cause of guttation is mainly due to
  • Root pressure
  • Osmosis
  • Transpiration pull
  • Cohesive force
Organic substances such as sugars are translocated in phloem can be demonstrated by
  • Defoliation
  • Girdling the stem
  • Grafting
  • Root pressure
The process of water exudation through the hydathode is called as
  • Guttation
  • Transpiration
  • Excretion
  • Hydrolysis
Match the labeling of  the structures A to E.
a. Hydathode pore or stoma
b. Tracheids
c. Epithem cells
d. Mesophyll cell
e. Guttation
f. Water and minerals
g. Water drop

155404_b4c086293cb545cabcd835c7bd647af0.png
  • A- g, B- a, C- b, D- d, E- c
  • A- g, B- a, C- b, D- c, E- d
  • A- a, B- g, C- b, D- d, E- c
  • A- c, B- a, C- b, D- d, E- g
Mass-flow hypothesis is also known as
  • Pressure flow hypothesis
  • Accelerated diffusion theory
  • Conventional flow hypothesis
  • All of the above
Translocation of food is:
  • Unidirectional
  • Omnidirectional
  • Bidirectional
  • Multidirectional 
Which of the following is imbibiant?
  • Proteins
  • Pectin
  • Starch
  • All of the above
A is rich in

155403_0cb05fca824e433995fbd29473cb48b2.png
  • Hydathode
  • Tracheids
  • Epithem cells
  • Mesophyll cell
  • Guttation
  • Water and minerals
  • Water drop
Loosely placed cells in a hydathode are known as
  • Complementary
  • Subsidiary
  • Phellic
  • Epithems
One molar solution of which substance will have maximum O.P?
  • NaCl
  • Glucose
  • Fructose
  • Starch
Water enters into the root hair from the soil in its normal condition because the osmotic pressure of the soil solution
  • Remains lesser than that of root hair sap
  • Remains equal to that of root hair sap
  • Remains higher than that of root hair sap
  •  Remains zero of root hair sap 
Plasma membrane controls
  • Passage of water only
  • Passage of water and solutes in and out of the cell
  • Passage of water and solutes into the cell only
  • Movement of cell contents out the cell only
Osmotic pressure is highest in
  • Xerophytes
  • Lithophytes
  • Halophytes
  • Mesophytes
Casparian strip occurs in:
  • Pericycle
  • Endodermis
  • Epidermis
  • Cortex
Food synthesized in the leaves is transported to other parts by
  • Translocation
  • Nastic movement
  • Chemotaxis
  • Phototaxis
The physical process involved in the release of molecular oxygen from leaves is
  • Diffusion
  • Transpiration
  • Osmosis
  • Capillarity
The volume of $${O_2}$$ liberated in photosynthesis has which of the following ratio to $$ {C O _2}$$?
  • $${O_2 / C O _2 = 1}$$
  • $${O_2 / C O _2 = 1/2}$$
  • $${O_2 / C O _2 = 2/1}$$
  • $${O_2 / C O _2 = 3/1}$$
The loss of water from the plants is known as
  • Respiration
  • Transpiration
  • Replication
  • Ascent of sap
The accurate relationship between SP, OP, TP can be expressed as
  • SP = OP + TP
  • OP = SP - TP
  • TP = SP - OP
  • SP = OP - TP
Water lost in guttation is
  • Pure water
  • Impure water
  • In vapour form
  • None of the above
Seeds swell when placed in water due to 
  • Hydrolysis
  • Imbibition
  • Both A and B
  • None of the above
Osmotic potential is numerically equal to
  • Turgor pressure
  • Wall pressure
  • Osmotic pressure
  • D.P.D.
The osmotic pressure is due to 
  • Solute
  • Semi permeable membrane
  • Hypertonic solution
  • Water
The best condition by which fully turgid cell can be identified is
  • TP is minimum
  • SP is maximum
  • OP less than SP
  • TP $$=$$ OP
The osmotic pressure of the cell is measured by
  • Plasmolysis method
  • Osmometer
  • Molar concentration of the cell sap
  • Deplasmolysis
Select the correct statement.
  • Pure water has minimum $$\psi_w$$.
  • Pure water has maximum $$\psi_w$$.
  • Pure water has maximum D.P.D.
  • Pure water has variable $$\psi_w$$ and DPD.
The direction of the movement of water
  • From low OP to high OP
  • From low DPD to high DPD
  • From high TP to low TP
  • All of the above
The osmotic pressure of distilled water will be
  • Minimum
  • Maximum
  • Higher than any solution
  • Variable
Maximum osmotic pressure is found in
  • Root hair
  • Cortex cell of the root
  • Passage cell of the root
  • Mesophyll cell
Plasmolysis can be used for
  • Good growth of plants
  • Good growth of weeds
  • Killing the weeds
  • None of the above
Bacteria can not survive in a highly salted pickle, because
  • Salt inhibits reproduction of bacteria.
  • Enough light is unavailable for photosynthesis.
  • They become plasmolysed and death occurs.
  • Nutrients in the pickle medium can not support life.
If there is high amount of fertilizer present in soil and it is deficient in water, then what will be the effect?
  • Over growth
  • Under growth
  • No effect
  • Wilting of plants
If a plasmolysed cell is placed in distilled water then it returns to its original state and become turgid, this is called as
  • Plasmolysis
  • Exosmosis
  • Endosmosis
  • Deplasmolysis
Loss of water from tips of leaves is called as
  • Bleeding
  • Guttation
  • Respiration
  • Transpiration
Osmotic potential ($$\psi_S$$) of a solution is always
  • Positive
  • Negative
  • Zero
  • Variable
When the solute has been added to the solution; its water potential will
  • Increase
  • Decrease
  • Remain unchanged
  • First increase then decrease
Water potential is affected by
  • Osmotic potential
  • Matrix potential
  • Pressure potential
  • All of the above
Value of water potential for pure water is
  • 1
  • 2
  • 3
  • 0
Root pressure is measured by
  • Manometer
  • Potometer
  • Auxanometer
  • Osmometer
Why hygroscopic water is not available to plants?
  • Because its $$\psi_\omega$$ is greatly increased
  • Because its DPD is greatly decreased
  • Because its $$\psi_\omega$$ is strongly negative
  • Because its $$\psi_\omega$$ is increased and DPD is decreased
0.1 M solution has water potential of
  • -2.43 bars
  • 0 bar
  • 22.4 bars
  • +2.3 bars
The water potential and osmotic potential of pure water is respectively
  • 100 and 0
  • 0 and 0
  • 100 and 200
  • 0 and 100
A root hair cell under ordinary conditions have a water potential in the range of
  • 1 to 4 atm
  • -1 to - 4 atm
  • 1 to 2 atm
  • -1 to 2 atm
The concept of water potential was propounded by
  • Robert mayer
  • Abbe Nollet
  • Slatyer and Taylor
  • Levitt
Solute potential can be expressed as 
  • $$\Psi s\, =\, -\, OP$$
  • $$\Psi s\, =\, OP$$
  • $$OP\, -\, \Psi s\, =\, 0$$
  • $$\displaystyle \frac{\Psi s}{OP}\, =\, 0$$
The direction of the water flow in given cells X, Y and Z can be represented as 
240958_4f4a6f85c2874f408066ac63229c9f63.png
  • $$X \rightarrow\, Y\, \leftarrow\, Z$$.
  • $$X\, \rightarrow\, Y\, \rightarrow\, Z$$.
  • $$X\, \leftarrow\, Y\, \leftarrow\, Z$$.
  • $$X\, \leftarrow\, Y\, \rightarrow\, Z$$.
The solute potential can be determined in a simple manner by
  • Water potential
  • DPD
  • Osmotic pressure
  • Suction pressure
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