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Plant Growth and Development

AIPMT 2002MCQEasyNot asked in last 5 yrs+4−1
Ques. 1AIPMT 2002

Which pigment absorbs the red and far-red light?

  1. Cytochrome
  2. Phytochrome
  3. Carotenoids
  4. Chlorophyll

Answer

(2) Phytochrome

Solution

Phytochrome is a chromoprotein pigment of plants that exists in two interconvertible forms:

Pr absorbs red light (about 660 nm) and changes to Pfr; Pfr absorbs far-red light (about 730 nm) and changes back to Pr.

∴ Phytochrome absorbs both red and far-red light and controls photoperiodic responses, seed germination, etc.

Answer: (2)

Keep practising — Plant Growth and Development

Ques. 2AIPMT 2002

Seed dormancy is due to the

  1. ethylene
  2. abscisic acid
  3. IAA
  4. starch
Ques. 3AIPMT 2002

Dwarfness can be controlled by treating the plant with

  1. cytokinin
  2. gibberellic acid
  3. auxin
  4. antigibberellin
Ques. 4AIPMT 2001

Which plant is LDP?

  1. Tobacco
  2. Glycine max
  3. Mirabilis jalapa
  4. Spinach
Ques. 5AIPMT 2001

Which of the following prevents the fall of fruits?

  1. GA3
  2. NAA
  3. Ethylene
  4. Zeatin
Ques. 6AIPMT 2001

Hormone responsible for senescence is

  1. ABA
  2. auxin
  3. GA
  4. cytokinin
Ques. 7AIPMT 2001

Which hormone breaks dormancy of potato tuber?

  1. Gibberellin
  2. IAA
  3. ABA
  4. Zeatin
Ques. 8AIPMT 2001

Proteinaceous pigment which controls the activities concerned with light is

  1. Carotenoids
  2. Phytochrome
  3. Chlorophyll
  4. Anthocyanin
Ques. 9AIPMT 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. 10AIPMT 2000

By which action a seed coat becomes permeable to water?

  1. scarification
  2. stratification
  3. vernalization
  4. all of the above
Ques. 11AIPMT 2000

Which hormone is responsible for fruit ripening?

  1. Ethylene
  2. Auxin
  3. Ethyl chloride
  4. Cytokinin

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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)