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Free download in PDF Transportation in Plants Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
Stomata open at night in
[A]
Succulents
[B]
Mesophytes
[C]
Hydrophytes
[D]
Halophytes
(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
(3)
Upward movement of water in plants is called
[A]
Sucking
[B]
Translocation
[C]
Ascent Of Sap
[D]
None of these
(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
(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
(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
(16)
In a turgid cell which will be zero
[A]
suction pressure
[B]
Osmotic pressure
[C]
Turgor pressure
[D]
wall 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
(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
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