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Free download in PDF Transportation in Plants Objective Type 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.
(21)
Which of the following does not cause opening of stomata?
[A]
Reduced pH
[B]
Increased pH
[C]
Light
[D]
low carbon dioxide concentration
(22)
Radial conduction of water takes place by
[A]
Vessels and trachieds
[B]
Ray parenchyma cells
[C]
Vessels
[D]
Phloem
Answer: Ray parenchyma cells
(23)
The first process by which water enters into the seed coat when a seed is placed in a suitable environment for germination is
[A]
Imbibition
[B]
Absorption
[C]
Osmosis
[D]
None of these
(24)
Which of the following helps in ascent of sap?
[A]
Transpiration
[B]
Capillarity
[C]
Root Pressure
[D]
All Of Above
(25)
Potometer works on the principle of
[A]
Amount of water absorbed equals the amount transpired
[B]
potential difference between the tip of the tube and that of the plant
[C]
Osmotic pressure
[D]
Root pressure
Answer: Amount of water absorbed equals the amount transpired
(26)
A few drops of sap were collecled by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap?
[A]
The absence of sugar
[B]
Acidic
[C]
Alkaline
[D]
Low refractive index
(27)
Root pressure develops due to
[A]
Increase in transpiration
[B]
Passive absorption
[C]
Active absorption
[D]
Low osmotic potential in soil
Answer: Active absorption
(28)
Transpiration and root pressure cause water to rise in plants by
[A]
pulling and pushing it, respectively
[B]
pushing and pulling it, respectively
[C]
Pulling it upward
[D]
pushing it upward
Answer: pulling and pushing it, respectively
(29)
Which one of the following elements in plants is not remobilised?
[A]
Phosphorus
[B]
Sulphur
[C]
Potassium
[D]
Calcium
(30)
Passage cells are thin-walled cells found in:
[A]
testa of seeds to enable emergence of growing embryonic axis during seed germination
[B]
central region of style through which the pollen tube grows towards the ovary
[C]
endodermis of roots facilitating rapid transport of water from cortex to pericycle
[D]
phloem elements that serve as entry points for substances for transport to other plant parts
Answer: endodermis of roots facilitating rapid transport of water from cortex to pericycle
31
The 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
Answer: mass flow involving a carrier and ATP
32
On plasmolysis, a plant cell
[A]
become turgid
[B]
become flaccid
[C]
Swells up
[D]
None of these
33
During ascent, water column present inside vessels and tracheids, does not rupture due to
[A]
cohension and adhesion
[B]
weak gravitational pull
[C]
transpiration pull
[D]
None of these
Answer: cohension and adhesion
34
The water potential of pure water is
[A]
less than zero
[B]
more than zero, but less than one
[C]
zero
[D]
more than one
35
Passive absorption of water by the root system is the result of
[A]
Tension on the cell sap due to transpiration
[B]
Osmotic force in the shoot system
[C]
Forces created in the cells of the root
[D]
Increased respiratory activity in root cells
Answer: Tension on the cell sap due to transpiration
36
The translocation of organic solutes in sieve tube members is supported by
[A]
P proteins
[B]
root pressure and transpiration pull
[C]
cytoplasmic streaming
[D]
mass flow involving a carrier and ATP
37
Which of the following experiment is called physiological demonstration of osmosis?
[A]
Thistle funnel- whose mouth is tied with parchment paper
[B]
potometer
[C]
Thistle funnel- whose mouth is tied with egg membrane
[D]
bell jar experiment
Answer: Thistle funnel- whose mouth is tied with parchment paper
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