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Plant Growth and Development

AIPMT 2002MCQEasy📈 Topic in 75% papers+4−1
Ques. 1AIPMT 2002

Dwarfness can be controlled by treating the plant with

  1. cytokinin
  2. gibberellic acid
  3. auxin
  4. antigibberellin

Answer

(2) gibberellic acid

Solution

As per NCERT, gibberellins cause an increase in length of axis (internodal elongation); they are used to increase the length of grape stalks and of sugarcane stems.

∵ Genetically dwarf plants (e.g., dwarf pea, dwarf maize) lack enough gibberellin, applying gibberellic acid (GA3) makes them grow to normal height.

∴ Dwarfness is controlled by gibberellic acid.

Answer: (2)

Keep practising — Plant Growth and Development

Ques. 2AIPMT 2001

Which plant is LDP?

  1. Tobacco
  2. Glycine max
  3. Mirabilis jalapa
  4. Spinach
Ques. 3AIPMT 2001

Which of the following prevents the fall of fruits?

  1. GA3
  2. NAA
  3. Ethylene
  4. Zeatin
Ques. 4AIPMT 2001

Hormone responsible for senescence is

  1. ABA
  2. auxin
  3. GA
  4. cytokinin
Ques. 5AIPMT 2001

Which hormone breaks dormancy of potato tuber?

  1. Gibberellin
  2. IAA
  3. ABA
  4. Zeatin
Ques. 6AIPMT 2001

Proteinaceous pigment which controls the activities concerned with light is

  1. Carotenoids
  2. Phytochrome
  3. Chlorophyll
  4. Anthocyanin
Ques. 7AIPMT 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. 8AIPMT 2000

By which action a seed coat becomes permeable to water?

  1. scarification
  2. stratification
  3. vernalization
  4. all of the above
Ques. 9AIPMT 2000

Which hormone is responsible for fruit ripening?

  1. Ethylene
  2. Auxin
  3. Ethyl chloride
  4. Cytokinin
Ques. 10AIPMT 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)