Plant Growth and Development: MCQs Test – 1 11

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NEET Questions on Plant Growth and Development| Solve online MCQ Tests on Plant Growth and Development and get your instant score and answers | Test no. 01

Plant growth and development: MCQs Quiz - 1

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Question 1
Coconut milk factor is:
A
An auxin
B
A gibberellin
C
Abscisic acid
D
Cytokinin
Question 2
Which one of the followings is a synthetic auxin?
A
IAA
B
NAA
C
IBA
D
GA
Question 3
An enzyme that can stimulate germination of barley seeds is
A
α-amylase
B
Lipase
C
Protease
D
Invertase
Question 4
Seed dormancy is due to the:
A
Ethylene
B
Abscisic acid
C
IAA
D
Starch
Question 5
Importance of day length in flowering of plants was first shown in:
A
Petunia
B
Letting
C
Tobacco
D
Cotton
Question 6
Phototropic curvature is the result of uneven distribution of:
A
Auxin
B
Gibberellin
C
Phytochrome
D
Cytokinins
Question 7
Coiling of garden pea tendrils around any support is an example of:
A
Thermotaxis
B
Thigmotaxis
C
Thigmonasty
D
Thigmotropism
Question 8
Natural cytokinins are synthesized in tissues that are:
A
Senescent
B
Dividing rapidly
C
Storing food material
D
Differentiating
Question 9
Which one of the followings is a gaseous plant hormone?
A
Ethylene
B
Gibberellin
C
IAA
D
Abscisic acid
Question 10
Differentiation of shoot is controlled by:
A
High auxin : cytokinin ratio
B
High cytokinin : auxin ratio
C
High gibberellin : auxin ratio
D
High gibberellin : cytokinin ratio
Question 11
Opening of floral buds into flowers, is a type of:
A
Autonomic movement of variation
B
Autonomic movement of locomotion
C
Autonomic movement of growth
D
Paratonic movement of growth
Question 12
The annular and spirally thickened conducting elements generally developed in the protoxylem when the root or stem is
A
Elongating
B
Maturing
C
Differentiating
D
Widening
Question 13
Which one of the following acids is a derivative of carotenoids?
A
Abscisic acid
B
Indole butyric acid
C
Indole-3-acetic acid
D
Gibberellic acid
Question 14
Cell elongation in internodal regions of the green plants takes place due to:
A
Cytokinins
B
Gibberellins
C
Ethylene
D
Indole acetic acid
Question 15
Which one of the following pairs, is not correctly matched?
A
IAA – Cell wall elongation
B
Abscisic acid – Stomatal closure
C
Gibberellic acid – Leaf fall
D
Cytokinin – Cell division
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