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Free download in PDF Plant Hormone 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)
Which plant hormone is responsible for saving the crops from falling.
[A]
Cytokinin
[B]
Gybberellin
[C]
Auxin
[D]
Ethylene
(2)
Name the plant hormone which is responsible for the ripening of fruits?
[A]
Ethylene
[B]
Auxin
[C]
Traumatic
[D]
Cytokinins
(3)
Which plant hormone is helpful in making RNA and protein?
[A]
Gibberellins
[B]
Auxin
[C]
Cytokinins
[D]
Ethylene
(4)
Which plant hormone is formed in injured cells by which the injury of plant is healed?
[A]
Florigens
[B]
Traumatic
[C]
Abscisic Acid
[D]
None of the above
(5)
Which of the following hormone help in the cell division and development in the presence of auxins?
[A]
Ethylene
[B]
Cytokinins
[C]
Auxins
[D]
Florigens
(6)
Growth regulators, which control plant growth and development are called___________
[A]
Secondary metabolites
[B]
Macro element
[C]
Nonessential elements
[D]
Phytohormone
(7)
Name the plant in which auxin was first discovered?
[A]
Mustard
[B]
Pea
[C]
Oats
[D]
Rice
(8)
Which of the following is NOT a naturally occurring auxin?
[A]
Indole 3-acetic acid (IAA)
[B]
Indole 3-butyric acid (IBA)
[C]
Phenyl acetic acid (PAA)
[D]
2,4-D
(9)
Name the site of Gibberellins synthesis
[A]
Endosperm
[B]
Coleoptile tip
[C]
Young leaves
[D]
Scetullum
(10)
What is bolting?
[A]
Internode elongation
[B]
Rooting
[C]
Shooting
[D]
Shoot apical meristem
Answer: Internode elongation
(11)
Which of the following plant hormone is responsible for seed germination?
[A]
Auxin
[B]
Gibberellin
[C]
Ethylene
[D]
Abscisic acid
(12)
Name the first naturally occurring cytokines.
[A]
Neoxanthin
[B]
Xanthoxin
[C]
Zeatin
[D]
Isopentenyl adenine
(13)
Name the stress hormone of the plant.
[A]
Brassinosteroid
[B]
Abscisic acid
[C]
Cytokines
[D]
Ethylene
(14)
The term auxin was coined by
[A]
Skoog
[B]
Haberlandt
[C]
Miescher
[D]
F.W. Went
(15)
Precursor of Indole acetic acid (natural auxin) is
[A]
Glycine
[B]
Methionine
[C]
Isopentynyl pyrophosphate
[D]
Tryptophan
(16)
“Agent orange” the leaf defoliator used by USA in Vietnam war was
[A]
ethylene
[B]
2,4,-D and 2,4,5-T
[C]
2,4,-D and NAA
[D]
2,4,5-T, NAA and ethylene
Answer: 2,4,-D and 2,4,5-T
(17)
All the following inhibits auxin transport (anti-auxins) except
[A]
Cytokinnin
[B]
α naphthyl thalamic acid
[C]
2,3,5-tri iodo benzoic acid
[D]
ethylene
(18)
Auxin transport is
[A]
polar
[B]
non-polar
[C]
symplast
[D]
apoplast
(19)
Which of the following is not a function of auxin
[A]
inducing dormancy
[B]
enhancing cell division
[C]
inducing callus formation
[D]
maintaining apical dominance
Answer: inducing dormancy
(20)
Nodule formation is induced by
[A]
IBA
[B]
IAA
[C]
Both (a) and (b)
[D]
NAA
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