Plant Hormone MCQs | Plant Hormone Multiple Choice Questions and Answers

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Questions
1 Which plant hormone is responsible for saving the crops from falling.
A Cytokinin
B Gybberellin
C Auxin
D Ethylene

Answer: Auxin
2 Name the plant hormone which is responsible for the ripening of fruits?
A Ethylene
B Auxin
C Traumatic
D Cytokinins

Answer: Ethylene
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3 Which plant hormone is helpful in making RNA and protein?
A Gibberellins
B Auxin
C Cytokinins
D Ethylene

Answer: Cytokinins
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

Answer: Traumatic
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

Answer: Cytokinins
6 Growth regulators, which control plant growth and development are called___________
A Secondary metabolites
B Macro element
C Nonessential elements
D Phytohormone

Answer: Phytohormone
7 Name the plant in which auxin was first discovered?
A Mustard
B Pea
C Oats
D Rice

Answer: Oats
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

Answer: 2,4-D
9 Name the site of Gibberellins synthesis
A Endosperm
B Coleoptile tip
C Young leaves
D Scetullum

Answer: Endosperm
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

Answer: Gibberellin
12 Name the first naturally occurring cytokines.
A Neoxanthin
B Xanthoxin
C Zeatin
D Isopentenyl adenine

Answer: Zeatin
13 Name the stress hormone of the plant.
A Brassinosteroid
B Abscisic acid
C Cytokines
D Ethylene

Answer: Abscisic acid
14 The term auxin was coined by
A Skoog
B Haberlandt
C Miescher
D F.W. Went

Answer: F.W. Went
15 Precursor of Indole acetic acid (natural auxin) is
A Glycine
B Methionine
C Isopentynyl pyrophosphate
D Tryptophan

Answer: 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

Answer: Cytokinnin
18 Auxin transport is
A polar
B non-polar
C symplast
D apoplast

Answer: polar
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

Answer: IAA

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