Transportation in Plants Quiz | Transportation in Plants Objective Type Questions and Answers

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Questions
21 Which of the following does not cause opening of stomata?
A Reduced pH
B Increased pH
C Light
D low carbon dioxide concentration

Answer: Reduced pH
22 Radial conduction of water takes place by
A Vessels and trachieds
B Ray parenchyma cells
C Vessels
D Phloem

Answer: Ray parenchyma cells
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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

Answer: Imbibition
24 Which of the following helps in ascent of sap?
A Transpiration
B Capillarity
C Root Pressure
D All Of Above

Answer: 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

Answer: Alkaline
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

Answer: 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

Answer: become flaccid
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

Answer: zero
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

Answer: P proteins
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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