Transport in Plants: MCQs Test – 2 2


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Test Type: MCQs (Multiple Choice Questions), Total Questions 15, Test Name: Transport in Plants – Test 02

Transport in Plants: MCQs Test - 2

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Question 1
Stomata open is due to accumulation of
A
K+
B
Na+
C
Ca+
D
Mg+
Question 2
Attraction of water molecules to polar surfaces is known as
A
Cohesion
B
Capillarity
C
Surface tension
D
Adhesion
Question 3
Which of the following is not a purpose of transpiration?
A
Supplies water for photosynthesis
B
Helps in translocation of sugars from source to sink
C
Maintains shape and structure of the plants
D
Transports minerals from the soil to all parts of the plant
Question 4
A soil sample is found to have 25% of its volume occupied by soil water. Of this, 10% is hygroscopic water and .the remaining is capillary water. What is the field capacity of this soil?
A
10%
B
15%
C
25%
D
35%
Question 5
When the conditions are dry, a grass leaf curls inward to minimize water loss due to presence of
A
Thick cuticle
B
Large xylem cavities
C
Parallel venation
D
Bulliform cells
Question 6
Cohesion theory of water movement in plants was put forth by
A
Henry Dixon
B
F. F. Blackman
C
Melvin cycle
D
Hans. A. Krebs
Question 7
Which of the following force is responsible for raising water up to 100 m of tall plants?
A
Root pressure
B
Capillary action
C
Transpiration pull
D
Air pressure
Question 8
The first process by which water enters into the seed coat when a seed is placed in suitable environment for germination is
A
Osmosis
B
Imbibition
C
Absorption
D
None of these
Question 9
When the concentration of the soil solutes is low, the absorption of water is
A
Remain normal
B
Decreased
C
Increased
D
Stopped
Question 10
When pea seeds and wheat grains are soaked in water, pea seeds showed more swelling than the wheat. The reason is
A
Cell membrane of pea seeds is more permeable
B
Presence of less hydrophilic colloids in the wheat grains
C
Imbibition capacity of proteins is more than that of starch
D
Cell walls of wheat grains are less permeable
Question 11
Which one of the following denotes the water potential of the mesophyll cell in wilted condition?
A
Greater than the value of its osmotic potential
B
Equal to the value of pressure potential
C
Equal to the value of osmotic potential
D
Equal to zero
Question 12
Identify the correct relationship with reference to water potential of a plant cell.
A
ψw = ψm + ψs + ψp
B
ψw = ψm + (ψs – ψp)
C
ψw = ψm – (ψs + ψp)
D
ψw = ψm – ψs – ψp
Question 13
Study the following lists and choose the correct option.
  List - I   List - II
A. Water potential of 10% salt solution I. Positive
B. Pressure potential in a normal cell II. Negative
C. Pressure potential in a plasmolysed cell III. Positive
C. Metric potential on the surface of the wood IV. Negative
    V. Zero
The correct match is :
A
A - II, B - III, C - V, D - IV
B
A - III, B - IV, C - II, D - I
C
A - I, B - II, C - IV, D - III
D
A - V, B - IV, C - II, D - I
Question 14
The values osmotic potential 'π' and pressure potential 'ρ' of cells A, B, C and D are given below:
Cell π ρ
Cell A –1.0 0.5
Cell B –0.6 0.3
Cell C –1.2 0.6
Cell D –0.8 0.4
Identify the correct sequence that shows the path of movement of water from among the following:
A
D → C → A → B
B
B → D → A → C
C
B → C → D → A
D
C → B → A → D
Question 15

Study the following table:

(I) Peperomia - Leaf succulent - Leaf epidermal cells store water

(II) Calotropis - Non-succulent - Root cells with thickened cell walls

(III) Tribulus - Ephemeral - Stem stores water

(IV) Ammophila - Dicot plant - Rolling in of leaves to check water loss

Identify the correct pair of answers.

A
I, II
B
I, III
C
II, III
D
II, IV
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There are 15 questions to complete.

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