Transportation in Plants MCQs | Transportation in Plants Multiple Choice Questions and Answers

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Questions
1 Stomata open at night in
A Succulents
B Mesophytes
C Hydrophytes
D Halophytes

Answer: Succulents
2 In which of the following plants, there will be no transpiration?
A Aquatic, submerged plants
B Aquatic plants with floating leaves
C Plants living in deserts
D Plants growing in hilly regions

Answer: Aquatic, submerged plants
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3 Upward movement of water in plants is called
A Sucking
B Translocation
C Ascent Of Sap
D None of these

Answer: Ascent Of Sap
4 Which of the following statements is not true for stomatal apparatus?
A Guard cells are always surrounded by subsidiary cells
B Stomata are involved in gaseous exchange
C Guard cells invariably posses chloroplast and mitochondria
D None of these

Answer: Guard cells are always surrounded by subsidiary cells
5 Transpiration is very important for plants because it helps in
A The cooling of leaves at high temperature
B The absorption of water from soil
C The movement of water and minerals absorbed by roots to various parts of the plant
D All of these

Answer: All of these
6 Munch hypothesis is based on
A Translocation of food due to turgor pressure (TP) gradient
B Translocation of food due to imbibitions force
C Translocation of food due to TP gradient and imbibitions force
D None of these

Answer: Translocation of food due to turgor pressure (TP) gradient
7 Water is lost in a liquid state in some plants through hydathodes. These hydathodes
A Remain always open
B Remain closed during day
C Remain closed at night
D Do not show any specificity in opening and closing

Answer: Remain always open
8 A column of water within xylem vessels of tall trees does not break under its weight because of
A Tensile Strength Of Water
B Positive Root Pressure
C Lignification Of Xylem Vessels
D Dissolved Sugars In Water

Answer: Tensile Strength Of Water
9 Which of the following criteria does not pertain to facilitated transport?
A Uphill transport
B Transport saturation
C Requirement of special membrane proteins
D High selectivity

Answer: Uphill transport
10 The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of
A Cohesion And Adhesion
B Transpiration Pull
C Lignified Thick Walls
D Weak Gravitational Pull

Answer: Cohesion And Adhesion
11 Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure-7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will be
A Movement of water from cell A to B
B Equilibrium between the two
C Movement of water from cell B to A
D No movernent of water

Answer: Movement of water from cell A to B
12 Root pressure occurs when there is
A Less transpiration and Less absorption
B More transpiration and more absorption
C Less transpiration and more absorption
D None of these

Answer: Less transpiration and more absorption
13 Osmosis invoves
A flow of solute without a membrane
B flow of water without a membrane
C Flow of water through a semipermeable membrane
D None of these

Answer: Flow of water through a semipermeable membrane
14 In plant water moves from
A similar gradient
B Less negative to more negative gradient
C zero gradient
D More negative to less negative gradient

Answer: Less negative to more negative gradient
15 With rise in turgidity, wall pressure will
A Remain Unchanged
B Decrease
C Fluctuate
D Increase

Answer: Increase
16 In a turgid cell which will be zero
A suction pressure
B Osmotic pressure
C Turgor pressure
D wall pressure

Answer: suction pressure
17 Which of the following chemical serves as an anti-transparent in plants?
A dimethyl mercury
B phenyl mercuric acetate
C Cobalt chloride
D Potassium iodide

Answer: phenyl mercuric acetate
18 In land plants, the guard cells differ from other epidermal cells in having
A ER
B Chloroplasts
C cytoskeleton
D mitochondria

Answer: Chloroplasts
19 Transpiration can be influenced by interfering with
A atmospheric temperature
B osmotic pressure
C Guard cell
D Epidermis of leaf

Answer: atmospheric temperature
20 Which one of the following theories for ascent of sap was proposed by eminent Indian scientist J. C Bose?
A Atmospheric pressure theory
B Transpiration Pull theory
C Pulsation theory
D Root pressure theory

Answer: Pulsation theory

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