Plant Hormone Multiple Choice Questions and Answers

Questions

1 Which plant hormone is responsible for saving the crops from falling.

A Cytokinin

B Gybberellin

C Auxin

D Ethylene

View Answer

Answer: Auxin

2 Name the plant hormone which is responsible for the ripening of fruits?

A Ethylene

B Auxin

C Traumatic

D Cytokinins

View Answer

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

View Answer

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

View Answer

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

View Answer

Answer: Cytokinins

6 Growth regulators, which control plant growth and development are called___________

A Secondary metabolites

B Macro element

C Nonessential elements

D Phytohormone

View Answer

Answer: Phytohormone

7 Name the plant in which auxin was first discovered?

A Mustard

B Pea

C Oats

D Rice

View Answer

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

View Answer

Answer: 2,4-D

9 Name the site of Gibberellins synthesis

A Endosperm

B Coleoptile tip

C Young leaves

D Scetullum

View Answer

Answer: Endosperm

10 What is bolting?

A Internode elongation

B Rooting

C Shooting

D Shoot apical meristem

View Answer

Answer: Internode elongation

11 Which of the following plant hormone is responsible for seed germination?

A Auxin

B Gibberellin

C Ethylene

D Abscisic acid

View Answer

Answer: Gibberellin

12 Name the first naturally occurring cytokines.

A Neoxanthin

B Xanthoxin

C Zeatin

D Isopentenyl adenine

View Answer

Answer: Zeatin

13 Name the stress hormone of the plant.

A Brassinosteroid

B Abscisic acid

C Cytokines

D Ethylene

View Answer

Answer: Abscisic acid

14 The term auxin was coined by

A Skoog

B Haberlandt

C Miescher

D F.W. Went

View Answer

Answer: F.W. Went

15 Precursor of Indole acetic acid (natural auxin) is

A Glycine

B Methionine

C Isopentynyl pyrophosphate

D Tryptophan

View Answer

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

View Answer

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

View Answer

Answer: Cytokinnin

18 Auxin transport is

A polar

B non-polar

C symplast

D apoplast

View Answer

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

View Answer

Answer: inducing dormancy

20 Nodule formation is induced by

A IBA

B IAA

C Both (a) and (b)

D NAA

View Answer

Answer: IAA

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