PYQSide ExamsMy practice

Plant Growth and Development · Question 40

AIPMT 2014MCQEasy📈 Topic in 38% papers+4−1
1

A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white-coloured like albinos. Which of the following terms will you use to describe them?

  1. Mutated
  2. Embolised
  3. Etiolated
  4. Defoliated

Answer

(3) Etiolated

Solution

In darkness chlorophyll is not formed, so the seedlings become pale or white with long, thin internodes and small leaves.

⇒ This condition of plants grown in the absence of light is called etiolation.

∴ The seedlings are etiolated.

Answer: (3)

AIPMT 2014

Keep practising — Plant Growth and Development

2

Which one of the following growth regulators is known as 'stress hormone'?

  1. Abscisic acid
  2. Ethylene
  3. GA3
  4. Indole acetic acid
AIPMT 2014
3

During seed germination its stored food is mobilized by

  1. ABA
  2. gibberellin
  3. ethylene
  4. cytokinin.
NEET 2013
4

The pineapple which under natural condition is difficult to blossom has been made to produce fruits throughout the year by application of

  1. NAA, 2,4-D
  2. Phenyl acetic acid
  3. Cytokinin
  4. IAA, IBA.
NEET 2013 (Karnataka)
5

Which of the following best illustrates "FEEDBACK" in development ?

  1. As tissue (X) develops, it secretes something that induces tissue (Y) to develop
  2. As tissue (X) develops, it secretes something that slows down the growth of tissue (Y)
  3. Tissue (X) secretes RNA which changes the development of tissue (Y)
  4. As tissue (X) develops, it secretes enzymes that inhibit the development of tissue (Y)
NEET 2013 (Karnataka)
6

Through their effects on plant growth regulators, what do the temperature and light control in the plants?

  1. Apical dominance
  2. Flowering
  3. Closure of stomata
  4. Fruit elongation
AIPMT 2012 (Mains)
7

Which one of the following generally acts as an antagonist to gibberellins?

  1. Zeatin
  2. Ethylene
  3. ABA
  4. IAA
AIPMT 2012 (Mains)
8

Vernalization stimulates flowering in

  1. zamikand
  2. turmeric
  3. carrot
  4. ginger.
AIPMT 2012 (Mains)
9

One of the commonly used plant growth hormones in tea plantations is

  1. ethylene
  2. abscisic acid
  3. zeatin
  4. indole-3-acetic acid
AIPMT 2010 (Mains)
10

Root development is promoted by

  1. abscisic acid
  2. auxin
  3. gibberellin
  4. ethylene
AIPMT 2010 (Mains)
11

Phototropic curvature is the result of uneven distribution of

  1. gibberellin
  2. phytochrome
  3. cytokinins
  4. auxin
AIPMT 2010 (Prelims)

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)