1.

    Plant hormones which show the antagonist effects to auxin w.r.t. apical dominance is

    A

    GAS

    B

    Cytokinin

    C

    ABA

    D

    Ethylene

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Plant Growth and Development
    🎯Topic:Growth Regulators
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :plant hormones, apical dominance, auxin, cytokinin, antagonism

    Related Questions

    1.

    ABA was discovered during

    A

    Mid 1960s

    B

    Mid 1959s

    C

    Mid 1096s

    D

    Mid 1996s

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Plant Growth and Development
    🎯Topic:Growth Regulators
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :History of Science, Plant Hormones, Abscisic Acid

    2.

    Micropropagation is done by

    A

    Auxins

    B

    GA

    C

    Cytokinin

    D

    Both (1) and (3)

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Plant Growth and Development
    🎯Topic:Growth Regulators
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Plant hormones, Micropropagation

    3.

    Which hormone is called the dormancy hormone?

    A

    IAA

    B

    NAA

    C

    ABA

    D

    GA

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Plant Growth and Development
    🎯Topic:Growth Regulators
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Plant hormones, Dormancy

    4.

    I. More female flowers in cucumber

    II. Ξ±-amylase production is barley grain

    III. Acceleration of fruit ripening in tomato

    IV. Delayed in sprouting in potato tubers

    From the given effects find, out the effects of ethylene and choose the correct option accordingly

    A

    I, III and IV

    B

    I, II and IV

    C

    II, III and IV

    D

    I, II and III

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Plant Growth and Development
    🎯Topic:Growth Regulators
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :plant hormones, abscisic acid, dormancy, sprouting

    5.

    Which hormone is responsible for apical growth?

    A

    IAA

    B

    ABA

    C

    GA

    D

    All of these

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Plant Growth and Development
    🎯Topic:Growth Regulators
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Plant hormones, Apical growth, Auxin (IAA)

    6.

    The 'Richmond-Lang effect', which refers to the delay of senescence in leaves by cytokinins, is primarily attributed to their influence on:

    A

    Ethylene production

    B

    Cell wall synthesis

    C

    Nutrient mobilization

    D

    Stomatal closure

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Plant Growth and Development
    🎯Topic:Growth Regulators
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Hard
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Senescence, Cytokinins, Richmond-Lang Effect, Nutrient Mobilization, Plant Growth Regulators

    7.

    Which hormone (PGR) encounters the apical dominance induced by auxin?

    A

    IAA

    B

    Cytokinin

    C

    C2H4{{\rm{C}}_2}{{\rm{H}}_4}

    D

    NAA

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Plant Growth and Development
    🎯Topic:Growth Regulators
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :plant hormones, apical dominance, auxin, cytokinin

    8.

    Kinetin, a modified form a adenine was discovered from

    A

    Autoclaved herring sperm DNA

    B

    Coconut milk

    C

    Corn kernel

    D

    Fungus

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Plant Growth and Development
    🎯Topic:Growth Regulators
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Plant hormones, Kinetin, Discovery of Kinetin

    9.

    Plant hormones are

    A

    Growth regulators

    B

    Growth promoters

    C

    Growth inhibitors

    D

    All of these

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Plant Growth and Development
    🎯Topic:Growth Regulators
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :plant hormones, growth regulation

    10.

    In the most situation, ABA acts as the

    A

    Agonist for auxin

    B

    Antagonist to gibberellin

    C

    Antagonist of auxin

    D

    Agonist to gibberellin

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Plant Growth and Development
    🎯Topic:Growth Regulators
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :plant hormones, abscisic acid (ABA), gibberellin, auxin, hormone interaction

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