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Plant Growth and Development

AIPMT 2001MCQEasy📈 Topic in 75% papers+4−1
Ques. 1AIPMT 2001

Which hormone breaks dormancy of potato tuber?

  1. Gibberellin
  2. IAA
  3. ABA
  4. Zeatin

Answer

(1) Gibberellin

Solution

Dormancy of buds and seeds is induced by ABA, an inhibitor; it is broken by promoters of growth.

⇒ Gibberellins counteract ABA and are applied to break the dormancy of potato tubers so that the 'eyes' (buds) sprout.

∵ IAA maintains apical dominance and ABA induces dormancy,

∴ gibberellin breaks the dormancy of potato tuber.

Answer: (1)

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Ques. 2AIPMT 2001

Proteinaceous pigment which controls the activities concerned with light is

  1. Carotenoids
  2. Phytochrome
  3. Chlorophyll
  4. Anthocyanin
Ques. 3AIPMT 2000

If the apical bud has been removed then we observe

  1. more lateral branches
  2. more axillary buds
  3. plant growing stops
  4. flowering stops
Ques. 4AIPMT 2000

By which action a seed coat becomes permeable to water?

  1. scarification
  2. stratification
  3. vernalization
  4. all of the above
Ques. 5AIPMT 2000

Which hormone is responsible for fruit ripening?

  1. Ethylene
  2. Auxin
  3. Ethyl chloride
  4. Cytokinin
Ques. 6AIPMT 2000

Coconut milk is used in tissue culture because it contains

  1. Auxin
  2. Gibberellin
  3. Ethylene
  4. Cytokinin
Out of syllabus

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All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)