Transpiration MCQ

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• Which of the following statement is INCORRECT for transpiration?
  ক

  It occurs by stomata, lenticels, and cuticle

  খ

  Water comes out as water vapour

  গ

  It occurs in all plants

  ঘ

  Root pressure is involved
• Name the specialized pores from where guttation takes place.
  ক

  Stomata

  খ

  Hydathodes

  গ

  Guard cell

  ঘ

  Lenticels
• What is guttation?
  ক

  Exudation of xylem sap

  খ

  Root pressure

  গ

  Radial movement

  ঘ

  Field capacity
• Which light modulates osmoregulation of guard cell?
  ক

  Green

  খ

  Orange

  গ

  Red

  ঘ

  Blue
• Mark the one, which is NOT the characteristics of the guard cell?
  ক

  Thickened inner wall

  খ

  Connected end to end

  গ

  Does not have chloroplast

  ঘ

  Radial micellation
• How much percentage of total transpiration is done by stomata?
  ক

  5-10

  খ

  90

  গ

  1-5

  ঘ

  60
• Stomata acts as turgor-operated valves?
  ক

  True

  খ

  False
• Which of the following statement is NOT true regarding the cuticles of the plant?
  ক

  Wax like covering of leaves

  খ

  Cutin is the principal substance

  গ

  Polymer of long chain fatty acids

  ঘ

  It is mainly composed of the only cutin
• Mark the one, which is NOT the form of transpiration?
  ক

  Radical transpiration

  খ

  Cuticular transpiration

  গ

  Lenticular transpiration

  ঘ

  Stomatal transpiration
• Loss of water from plants in the form of water vapour is called___________
  ক

  Surface tension

  খ

  Cohesion

  গ

  Ascent of sap

  ঘ

  Transpiration
• Statement A: Transpiration creates pressure in xylem sufficient enough to transport water up to 130 m high. Statement B: Transpiration creates a pushing force.
  ক

  Both the statements are true

  খ

  Both the statements are false

  গ

  Statement A is true but Statement B is false

  ঘ

  Statement B is true but Statement A is false
• Statement A: Inner wall is pushed outwards Statement B: Outer wall is pulled outwards
  ক

  Both the statements are true

  খ

  Both the statements are false

  গ

  Statement A is true but Statement B is false

  ঘ

  Statement B is true but Statement A is false
• The small diameter of the tracheary elements increases ___________
  ক

  adhesion

  খ

  cohesion

  গ

  tensile strength

  ঘ

  capillarity
• Transpirative loss is studied through girdling experiment.
  ক

  True

  খ

  False
• Which among the following is an internal factor affecting transpiration?
  ক

  Temperature

  খ

  Humidity

  গ

  % open stomata

  ঘ

  Wind speed
• Which among the following is an external factor affecting transpiration?
  ক

  Light

  খ

  Number of stomata

  গ

  Canopy structure

  ঘ

  Water status of plant
• Statement A: C3 plants are twice efficient as C4 plants in terms of fixing carbon dioxide. Statement B: C4 plant loses twice the amount of water as C3 plant for same amount of CO2 fixed.
  ক

  Both the statements are true

  খ

  Both the statements are false

  গ

  Statement A is true but Statement B is false

  ঘ

  Statement B is true but Statement A is false
• Which of the following is not a function of stomata?
  ক

  Regulation of turgidity of guard cells

  খ

  Loss of water vapor

  গ

  Loss due to guttation

  ঘ

  Exchange of O2 and CO2
• Isobilateral leaf has equal number of stomata on both surfaces of the leaf.
  ক

  True

  খ

  False