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Transport in Plants · Question 29

AIPMT 2006MCQMedium📈 Topic in 12% papers+4−1
1

The translocation of organic solutes in sieve tube members is supported by

  1. cytoplasmic streaming
  2. root pressure and transpiration pull
  3. P-proteins
  4. mass flow involving a carrier and ATP.

Answer

(3) P-proteins

Solution

Sieve tube members are enucleate living cells whose lumen contains P-protein (phloem protein) filaments.

P-proteins form the supporting (structural) system of the sieve tube for the translocation of organic solutes; root pressure and transpiration pull concern water movement in xylem.

Answer: (3)

Out of syllabusAIPMT 2006

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2

Potometer works on the principle of

  1. osmotic pressure
  2. amount of water absorbed equals the amount transpired
  3. root pressure
  4. potential difference between the tip of the tube and that of the plant.
Out of syllabusAIPMT 2005
3

Stomata of a plant open due to

  1. influx of potassium ions
  2. efflux of potassium ions
  3. influx of hydrogen ions
  4. influx of calcium ions
Out of syllabusAIPMT 2003
4

Opening and closing of stomata is due to the

  1. hormonal change in guard cells
  2. change in turgor pressure of guard cells
  3. gaseous exchange
  4. respiration.
Out of syllabusAIPMT 2002
5

Glycolate induces opening of stomata in

  1. presence of oxygen
  2. low CO2 concentration
  3. high CO2
  4. CO2 absent
Out of syllabusAIPMT 2001
6

Loading of phloem is related to

  1. increase of sugar in phloem cell
  2. elongation of phloem cell
  3. separation of phloem parenchyma
  4. strengthening of phloem fiber
Out of syllabusAIPMT 2001
7

The movement of ions against the concentration gradient will be

  1. active transport
  2. osmosis
  3. diffusion
  4. all of the above
Out of syllabusAIPMT 2000

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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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