PYQSide ExamsMy practice

Plant Growth and Development · Question 71

AIPMT 2002MCQEasy📈 Topic in 0% papers+4−1
1

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)

AIPMT 2002

Keep practising — Plant Growth and Development

2

Seed dormancy is due to the

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

Dwarfness can be controlled by treating the plant with

  1. cytokinin
  2. gibberellic acid
  3. auxin
  4. antigibberellin
AIPMT 2002
4

Which plant is LDP?

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

Which of the following prevents the fall of fruits?

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

Hormone responsible for senescence is

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

Which hormone breaks dormancy of potato tuber?

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

Proteinaceous pigment which controls the activities concerned with light is

  1. Carotenoids
  2. Phytochrome
  3. Chlorophyll
  4. Anthocyanin
AIPMT 2001
9

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
AIPMT 2000
10

By which action a seed coat becomes permeable to water?

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

Which hormone is responsible for fruit ripening?

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

All Plant Growth and Development PYQs →

PDFDownload Plant Growth and Development PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
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)