.This hormone is used in beer-brewing industry
1.Zeatin
2.Ethylene
3.Gibberellins
4.Abscissic acid
14.Bolting is useful to induce early flowering in
1.Medicinal plants
2.Oil yielding plants
3.Cereals
4.Ornamental plants
19.Only true natural auxin of higher plants is
1.GA
2.NAA
3.IAA
4.Neatin
A hormone like synthetic organic compound which in small amounts promotes or inhibits growth and development is called
1.Growth inhibitor
2.Growth regulator
3.Plant hormone
4.NAA
Ageing process of plants is delayed by
1.Auxins
2.Gibberellins
3.Cytokinins
4.NAA
An example of genetically identical cells of common origin is
1.Gamete
2.Zygote
3.Spore
4.Pollen
An example of synthetic plant growth regulator is
1.1AA
2.NAA
3.Auxin
4.CoA
An important plant hormone is
1.Androgen
2.Algin
3.Auxin
4.Ferrodoxin
An organic compound that retards growth is called
1.Growth regular
2.Plant hormone
3.Growth inhibitor
4.Auxin
An organic substance which is active in very minute quantity is
1.Plant hormone
2.Growth regulator
3.Growth inhibitor
4.IAA
Apical dominance caused by IAA is reserved by
1.Auxin
2.Gibberellin
3.NAA
4.Kinetin
Auxins produced by the apical buds suppress the growth of the
1.Terminal buds
2.Axillary buds
3.Lateral buds
4.Terminal flowers
Bolting is useful to induce early flowering in
1.Medicinal plants
2.Oil yielding plants
3.Cereals
4.Ornamental plants
Cell division of tobacco cells in tissue culture was stimulated by
1.NAA
2.Gibberellin
3.Kinetin
4.Auxin
Chemical name of Kinetin is
1.24-dichloro phenoxyacetic acid
2.Indole-3-acetic acid
3.Naphthalene-acetic acid
4.6-furfuryl amino purine
Coleoptile curvature test is used as a confirmation of the compound as
1.Gibberrellin
2.Cytokinin
3.Auxin
4.Zeatin
Cytokinins are not abundant in
1.Embryos
2.Developing fruits
3.Developing roots
4.Developing stems
Development of ovary into fruit without the act of fertilization is called
1.Parthenocarpy
2.Epicarpy
3.Endocarpy
4.Mesocarpy
Flowering can be induced in plants which require specific photo period by
1.Auxins
2.Gibberellins
3.Cytokinins
4.Ethylene
Flowering can be induced in plants which require specific photo period by
1.Auxins
2.Gibberellins
3.Cytokinins
4.Ethylene
Gibberellins were discovered in
1.Austria
2.Japan
3.Holland
4.Germany
Gibberellins were extracted from
1.Bacteria
2.Virus
3.Algae
4.Fungi
Growth and differentiation results in
1.Development
2.Retardation
3.Movement
4.Inhibition
Growth in length of plants can be measured by
1.Potometer
2.Mercury manometer
3.Light Screen
4.Lever auxanometer
Growth in plants is regulated through
1.Gene action
2.Biochemical parameters
3.Environmental conditions
4.All the three
In plants where IAA fails to induce parthenocarpy this hormone is used successfully
1.Ethylene
2.NAA
3.Gibberellins
4.Zeatin
Kinetin can promote bud or root formation in callus tissue in combination with
1.NAA
2.GA
3.24-D
4.IAA
Kinetin was isolated first from
1.Oat
2.Fungus
3.Zea mays
4.Herring
Limited type of growth is seen in this plant
1.Annul
2.Biennial
3.Perennial
4.Woody plants
Name of the instrument with a movable pointer fixed to a pulley and a graduated are fixed to a stand
1.Darwin�s photometer
2.Mercury manometer
3.Lever auxanometer
4.Light screen
Origin of parts or organs and the gross from of the plant is referred as
1.Gametogenesis
2.Morphogenesis
3.Organogenesis
4.Blastogenesis
Phototropic movements of plants were studied by
1.Went
2.Embden
3.Parnas
4.Darwin
Premature fall of leaves and fruits are prevented by
1.GA?
2.GA?
3.Zeatin
4.Auxin
Seedless fruits are produced by using
1.Cytokinin
2.Zeatin
3.Gibberellin
4.Auxin
Sigmoidal pattern of growth is seen in
1.Annuals
2.Biennials
3.Woody Perennials
4.Annuals and woody Perennials
The botanical name of fungus from which gibberellins were extracted
1.Avena
2.Mirabilis jalapa
3.Gibberella fujikuroi
4.Lathyrus odoratus
The botanical name of fungus from which gibberellins were extracted
1.Avena
2.Mirabilis jalapa
3.Gibberella fujikuroi
4.Lathyrus odoratus
The botanical name of oat is
1.Avena
2.Antirrhinum
3.Cicer
4.Sorghum
The combination of hormones required to produce plantlets in tissue culture is
1.Auxin and ethylene
2.Kinetin and IAA
3.NAA and IAA
4.Kinetin and NAA
The Concentration of auxin required to promote cell enlargement along the longitudinal axis of stem is
1.0.1 M
2.0.001 M
3.1.001 M
4.0.001 M
The cytokinins isolated from endosperm of tender coconut is
1.Ethylene
2.Auxin
3.Zeatin
4.NAA
The following hormone stimulates respiration in plants is
1.GA1
2.Auxin
3.GA2
4.Cytokinin
The germination of potato tubers during storage is prevented by spraying
1.Gibberrellins
2.Auxin
3.Cytokinin
4.Ethylene
The hormone applied to hasten rooting in stem cutting of plants is
1.Ethylene
2.Giberrellin
3.Cytokinin
4.Auxin
The hormone that breaks dormancy in some light sensitive seeds is
1.Cytokinins
2.Auxin
3.Gibberellin
4.NAA
The hormone that breaks dormancy in some light sensitive seeds is
1.Cytokinins
2.Virus
3.Auxin
4.Gibberellin
The hormone that induces the formation of parthenocarpic fruits is
1.Auxin
2.Zeatin
3.IAA
4.Cytokinin
The hormone which breaks dormancy of buds is
1.IAA
2.Auxin
3.Cytokinin
4.Gibberellin
The hormone which causes apical dominance is
1.GAz
2.Zeatin
3.Auxin
4.Cytokinin
The internode elongation in rice plants is due to
1.Polyphagia disease
2.Bakanae disease
3.Hydrophobia disease
4.Polydypsia disease
The name of the disease caused by Gibberella fujikurai is
1.Bakanae
2.Cytokinesis
3.Polyphagia
4.Hydrophobia
The number of gibberellins isolated from different plant sources is
1.40
2.50
3.90
4.120
The pattern of growth in plan6ts shows
1.L shaped curve
2.straight curve
3.Triangle curve
4.S shaped curve
The period of declining growth and the organism maintains the size it has already achieved is called
1.Steady state phase
2.Log phase
3.Lag phase
4.Stable phase
The physiological properties of auxins are used in the field of
1.Agriculture
2.Horticulture
3.Medicine
4.Sericulture
The rapid growing phase of sigmoid curve is known as
1.Steady state phase
2.Log phase
3.Lag phase
4.Stable phase
The sigmoid growth curve contains
1.2 phases
2.3 phases
3.4 phases
4.5 phases
The steady state phase is followed by sentence and death in these plants
1.Annuals
2.Biennials
3.Annuals and Biennials
4.Perennials
The synthetic auxin used as herbicide is
1.Naphthalene-acetic acid (NAA)
2.Indole-3-acetic acid (IAA)
3.24-dichloro phenoxyacetic acid (2 4-D)
4.6-furfuryl amino purine
The transformation of genetically identical cells of common origin into different tissues is
1.Cell division
2.Enlargement
3.Cell differentiation
4.Movement
This is not a gibberelic acid
1.GA1
2.GA2
3.GA3
4.IAA
This is not the usual site of auxin formation in higher plants
1.Meristems
2.Enlarging tissues
3.Enlarging flowers
4.Enlarging young leaves
What is the net result of the metabolic processes going on in a plant
1.Respiration
2.Photosynthesis
3.Growth
4.Transpiration
Zeatin is isolated from
1.Gibberella fujikuroi
2.Zea mays
3.Avena
4.Oat