Quiz  /  NEET MCQ on Plant Hormones

  • 1. 
    Indole-3-acetic acid is the most common naturally occurring plant hormone of _______ class

  • Gibberellin
  • Auxin
  • Ethylene
  • Cytokinin

  • 2. 
    This hormone is not a growth inhibitor

  • Dormin
  • Abscisic acid
  • Ethylene
  • IAA

  • 3. 
    ___________ is a gaseous plant hormone

  • IBA
  • Ethylene
  • Abscisic acid
  • NAA

  • 4. 
    A widely used rooting hormone is

  • 2,4, -D
  • NAA
  • 2,4,5 – T
  • Cytokinin

  • 5. 
    The leaf defoliator utilized in the Vietnam war by the USA known as “Agent Orange” was

  • 2,4, -D and 2,4,5 – T
  • Ethylene
  • 2,4, -D and NAA
  • 2,4,5 – T, ethylene and NAA

  • 6. 
    Transport of auxin is

  • non-polar
  • symplast
  • apoplast
  • polar

  • 7. 
    Formation of the nodule is induced by

  • IAA
  • NAA
  • IBA
  • Both and

  • 8. 
    This is the precursor of Indole-3-acetic acid

  • Methionine
  • Tryptophan
  • Glycine
  • Isopentynyl pyrophosphate

  • 9. 
    This bioassay is used to detect the presence of auxin

  • Only tobacco pith culture
  • Tobacco pith culture and Avena curvature test
  • Tobacco pith culture and Split pea stem curvature test
  • Split pea stem curvature test and Avena curvature test

  • 10. 
    Which of these is not a function of auxin?

  • inducing callus formation
  • inducing dormancy
  • enhancing cell division
  • maintaining apical dominance
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