Botany/Plant harmones Sample Test,Sample questions

Question: Bud initiation in shoots in promoted by

1.Auxin

2.Gibberelin

3.Auxin and cytokinins

4.None


Question: The enzyme which is stimulate germination of barley seeds is

1.Lipase

2.Protease

3.Invertase

4.α-amylase


Question: Acids which is a derivative of carotenoids

1.IBA

2.Abscisic acid

3.IAA

4.Gibberellic aciD


Question: Agent orange the leaf defoliator used by USA in Vietnam war was

1.2,4,5-T, NAA and ethylene

2.2,4,-D and NAA

3.2,4,-D and 2,4,5-T

4.ethylene


Question: Agrobacterium tumefaciens Ti plasmids t-DNA has genes for

1.Auxin and giberrellins

2.cytokinins and ethylene

3.Auxin and cytokinins

4.cytokinins and giberrellins


Question: All are anti giberrellins except

1. phosphon D

2.acetosyringone

3.maleic hydrazide

4.None


Question: All are natural auxins except

1.Phenoxy acetic acid

2.Indole-3-acetic acid

3.NAA

4.IAA


Question: All are synthetic auxins except

1.2,4,5-T

2.2,4,-D

3.IAA

4.NAA


Question: All the following hormones are growth inhibitors except

1.IAA

2.ethylene

3.dormin

4.Absiccic acid


Question: All the following inhibits auxin transport (anti-auxins) except

1.ethylene

2.2,3,5-tri iodo benzoic acid

3.α naphthyl thalamic acid

4.Cytokinnin


Question: Amyloplasts are

1.Tonoplast

2.Chloroplasts

3.Large starch grains

4.None


Question: Antagonistic to gibberellins, flowering is promoted in short day plants by

1.Abscisic acid

2.Methane

3.Auxin

4.Gibberelin


Question: Auxin is produced in

1.Growing root tips

2.Old roots

3.Growing shoot tips

4.Both A and C


Question: Auxin transport is

1.polar

2.non-polar

3.apoplast

4.symplast


Question: Bolting of some rosette plants is promoted by

1.giberellins

2.Auxin

3.ethane

4.None


Question: Cell elongation in internodal regions of the green plants takes place due to

1.Gibberellin

2.Cytokinins

3.IAA

4.IBA


Question: Coconut milk factor is

1.Cytokinin

2.Auxin

3.Auxin and cytokinins

4.Gibberelin


Question: Coiling of garden pea tendrils around any support is an example of

1.Thigmotropism

2.Thermotaxis

3.Thigmotaxis

4.Thigmonasty


Question: Cytokinins are

1.adenine derivatives

2.Guanine derivatives

3.Uracil derivatives

4.Thymine derivatives


Question: Differentiation of shoot is controlled by

1.High cytokinin : auxin ratio

2.High auxin : cytokinin ratio

3.High gibberellin : auxin ratio

4.High gibberellin : cytokinin ratio


Question: Gaseous plant hormone is

1.Gibberellin

2.IAA

3.Abscisic acid

4.Ethylene


Question: Gibberelins sometimes substitute for

1.blue light

2.red light

3.green light

4.yellow light


Question: Gibberellins are produced commercially from

1.Virus culture

2.Plant culture

3.Bacterial culture

4.Fungal culture


Question: Gibberellins was named after a fungus known as

1.Gibberella fujikuroi

2.Gibberella gaditijirrii

3.Gibberella africana

4.Gibberella acuminata


Question: IAA is

1.indole acetic acid

2.Iodine acetic acid

3.initiator acetic acid

4.None


Question: Importance of day length in flowering of plants was first shown in

1.Tobacco

2.Petunia

3.Letting

4.None


Question: Name the plant hormone which is formed in injured cells for healing of damage part ?

1.Auxin

2.Gibberelin

3.Cytokinin

4.None of the above


Question: Name the plant hormone which is help in breaking the dormancy of plant?

1.Auxin

2.Auxin and Gibberellin

3.Gibberellin

4.None


Question: Name the plant hormone which is helpful in making RNA and protein?

1.Cytokinins

2.Traumatic

3.Auxin and cytokinins

4.Auxin only


Question: Natural cytokinins are synthesized in tissues that are

1.Senescent

2.Storing food material

3.Dividing rapidly

4.Differentiating


Question: Nodule formation is induced by

1.IAA

2.IBA

3.NAA

4.Both (A) and (C)


Question: Opening of floral buds into flowers, is a type of

1.Autonomic movement of growth

2.Autonomic movement of variation

3.Autonomic movement of locomotion

4.None


Question: Phototropic curvature is the result of uneven distribution of

1.Auxin and giberrellins

2.Auxin

3.Gibberellin

4.Cytokinins


Question: Plant hormone which is help in the cell division and development in the presence of auxins

1.Auxin

2.cytokinins and ethylene

3.Gibberellin

4.Cytokinnin only


Question: Plant hormone which is responsible for environmental stress and dormancy is

1.Abscisic acid

2.Auxin

3.Cytokines

4.IBA


Question: Plant hormone which is responsible for saving the crops from falling

1.Cytokinin

2.Ethylene

3.Gybberellin

4.Auxin


Question: Plant hormone which is responsible for the ripening of fruits

1.Florigens

2.Ethylene

3.Abscisic Acid

4.Gybberellin


Question: Precursor of Indole acetic acid (natural auxin) is

1.Glycine

2.Methionine

3.Isopentynyl pyrophosphate

4.Tryptophan


Question: Seed dormancy is due to the

1.Abscisic acid

2.Auxin

3.Gibberelin

4.None


Question: Sprouting of potatoes is inhibited by

1.2,4 D

2.IAA

3.IBA

4.Cytokinin


Question: Stem elongation is controlled through

1.Auxin

2.Gibberellins

3.Auxin and cytokinins

4.None


Question: Synthetic auxin is

1.NAA

2.GA

3.IBA

4.Both A and C


Question: The annular and spirally thickened conducting elements generally developed in the protoxylem when the root or stem is

1.Maturing

2.Differentiating

3.Widening

4.Elongating


Question: The first kinetin isolated by Miller was from

1.maize grains

2.coconut endosperm

3.wheat grains

4.herring sperm DNA


Question: The first natural cytokinin isolated from liquid endosperm was

1.zeatin

2.isopentanyl adenine

3.6-amino purine

4.6-isopentanyl aenine


Question: The most studied gibberellin is

1. GA1

2.GA3

3.GA5

4.GA7


Question: The plant hormone which is formed in leaves and helps in the blooming of the flowers

1.Auxin

2.gibberelin

3.Cytokinin

4.Florigens


Question: The plant hormone which is found in gaseous form

1.Florigens

2.Gybberellin

3.Cytokinin

4.Ethylene


Question: The term auxin was coined by

1.Skoog

2.Miescher

3.Haberlandt

4.F.W. Went


Question: Weed killing is done by

1.IAA

2.IBA

3.2,4 D

4.None


Question: Which of the following auxin is widely used as a selective weedicide

1.NAA

2.IBA

3.2,4,-D

4.2,4,5-T


Question: Which of the following bioassays are used to detect the presence of auxin

1.Split pea stem curvature test and tobacco pith culture

2.Avena curvature test and tobacco pith culture

3.Avena curvature test and Split pea stem curvature test

4.tobacco pith culture only


Question: Which of the following is a gaseous hormone

1.Abscicic acid

2.IBA

3.Ethylene

4.NAA


Question: Which of the following is a natural cytokinin

1.isopentanyl adenine

2.zeatin

3.6-amino purine

4.6-isopentanyl aenine


Question: Which of the following is an auxin receptor

1.ETR1

2.CBP1

3.ABP1

4.GRE


Question: Which of the following is not a function of auxin

1.inducing callus formation

2.maintaining apical dominance

3.enhancing cell division

4.inducing dormancy


Question: Which of the following is widely used as a rooting hormone

1.2,4, D

2.NAA

3.cytokinnin

4.2,4,5-T


Question: Which of the following statement is incorrect ?

1.Auxins are produced at the region of elongation

2.Auxins are the most important plant hormone

3.Auxins are also important in regulating the fall of leaves and fruits

4.IAA is a principal auxin


Question: Which of the plant hormone increases the activity of cambium in the wooden plants?

1.Florigens

2.Gibberellins

3.Cytokinins

4.Auxin and Gibberelin


Question: Which one of the following pairs, is correctly matched

1.IAA – Cell wall elongation

2.Abscisic acid – Stomatal closure

3.Cytokinin – Cell division

4.All


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