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Strategies for Enhancement in Food Production · Question 19

AIPMT 2015 (Cancelled)MCQMedium📈 Topic in 25% papers+4−1
1

Which of the following enhances or induces fusion of protoplasts ?

  1. Sodium chloride and potassium chloride
  2. IAA and kinetin
  3. Polyethylene glycol and sodium nitrate
  4. IAA and gibberellins

Answer

(3) Polyethylene glycol and sodium nitrate

Solution

As per NCERT, isolated protoplasts (cells without cell walls, obtained by digesting walls with enzymes) from two different varieties of plants can be fused to get hybrid protoplasts (somatic hybrids).

⇒ Chemical fusogens used to induce this fusion are polyethylene glycol (PEG) and sodium nitrate (NaNO3).

∵ IAA, kinetin and gibberellins are plant growth regulators used in the culture medium, not fusogens; NaCl and KCl do not induce fusion.

∴ Polyethylene glycol and sodium nitrate induce fusion of protoplasts.

Answer: (3)

Out of syllabusAIPMT 2015 (Cancelled)

Keep practising — Strategies for Enhancement in Food Production

2

To obtain virus-free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken ?

  1. Epidermis only
  2. Palisade parenchyma
  3. Both apical and axillary meristems
  4. Apical meristem only
AIPMT 2014
3

In vitro clonal propagation in plants is characterized by :

  1. Microscopy
  2. Northern blotting
  3. Electrophoresis and HPLC
  4. PCR and RAPD
Out of syllabusAIPMT 2014
4

In plant breeding programmes, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called :

  1. germplasm collection
  2. evaluation and selection of parents
  3. selection of superior recombinants
  4. cross-hybridisation among the selected parents
Out of syllabusNEET 2013
5

Tissue culture technique can produce infinite number of new plants from a small parental tissue. The economic importance of the technique is in raising:

  1. development of new species
  2. genetically uniform population identical to the original parent
  3. variants through picking up somaclonal variations
  4. homozygous diploid plants
NEET 2013 (Karnataka)
6

Which of the following statements is not true about somatic embryogenesis ?

  1. Somatic embryos can develop from microspores
  2. Somatic embryo is induced usually by an auxin such as 2,4-D
  3. The pattern of development of a somatic embryo is comparable to that of a zygotic embryo
  4. A somatic embryo develops from a somatic cell
NEET 2013 (Karnataka)
7

Consider the following four statements (a-d) and select the option which includes all the correct ones only :

  1. Statements B, C and D
  2. Statements C, D
  3. Statements A, C and D
  4. Statements A, B
AIPMT 2012 (Mains)
8

Green revolution in India occurred during -

  1. 1980's
  2. 1950's
  3. 1960's
  4. 1970's
Out of syllabusAIPMT 2012 (Mains)
9

Which one of the following is a case of wrong matching?

  1. Somatic hybridization - Fusion of two diverse cells
  2. Callus - Unorganised mass of cells produced in tissue culture
  3. Vector DNA - Site for tRNA synthesis
  4. Micropropagation - In vitro production of plants in large numbers
AIPMT 2012 (Prelims)
10

Which part would be most suitable for raising virus-free plants for micropropagation?

  1. Vascular tissue
  2. Node
  3. Bark
  4. Meristem
AIPMT 2012 (Prelims)
11

When two unrelated individuals or lines are crossed, the performance of F1 hybrid is often superior to both parents. This phenomenon is called :

  1. Splicing
  2. Transformation
  3. Heterosis
  4. Metamorphosis
AIPMT 2011 (Prelims)

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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
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