PYQSide ExamsMy practice

Plant Growth and Development · Question 34

NEET 2016 (Phase 2)MCQEasy📈 Topic in 75% papers+4−1
1

You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?

  1. IAA and gibberellin
  2. Auxin and cytokinin
  3. Auxin and abscisic acid
  4. Gibberellin and abscisic acid

Answer

(2) Auxin and cytokinin

Solution

As per NCERT, auxins promote root initiation and cytokinins promote shoot (bud) formation; in tissue culture the callus differentiates into shoots and roots depending on the ratio of auxin to cytokinin in the medium.

⇒ High cytokinin : auxin ratio shoots; high auxin : cytokinin ratio roots.

∴ Auxin and cytokinin must be added to obtain both shoots and roots.

Answer: (2)

NEET 2016 (Phase 2)

Keep practising — Plant Growth and Development

2

Phytochrome is a

  1. flavoprotein
  2. glycoprotein
  3. lipoprotein
  4. chromoprotein
NEET 2016 (Phase 2)
3

Auxin can be bioassayed by

  1. potometer
  2. lettuce hypocotyl elongation
  3. Avena coleoptile curvature
  4. hydroponics.
AIPMT 2015
4

What causes a green plant exposed to the light, on only one side, to bend towards the source of light as it grows?

  1. Light stimulates plant cells on the lighted side to grow faster.
  2. Auxin accumulates on the shaded side, stimulating greater cell elongation there.
  3. Green plants need light to perform photosynthesis.
  4. Green plants seek light because they are phototropic.
AIPMT 2015 (Cancelled)
5

Typical growth curve in plants is

  1. stair-steps shaped
  2. parabolic
  3. sigmoid
  4. linear.
AIPMT 2015 (Cancelled)
6

Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleoptile stumps. Of what significance is this experiment?

  1. It made possible the isolation and exact identification of auxin.
  2. It is the basis for quantitative determination of small amounts of growth-promoting substances.
  3. It supports the hypothesis that IAA is auxin.
  4. It demonstrated polar movement of auxins.
AIPMT 2014
7

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
AIPMT 2014
8

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
9

During seed germination its stored food is mobilized by

  1. ABA
  2. gibberellin
  3. ethylene
  4. cytokinin.
NEET 2013
10

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)
11

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)

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)