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Transport in Plants · Question 20

AIPMT 2015 (Cancelled)MCQEasy📈 Topic in 12% papers+4−1
1

In a ring girdled plant

  1. the shoot and root die together
  2. neither root nor shoot will die
  3. the shoot dies first
  4. the root dies first.

Answer

(4) the root dies first.

Solution

As per NCERT (girdling experiment), removing a ring of bark removes the phloem, so food made in the leaves cannot move down past the ring.

Xylem is intact, water still reaches the shoot, which keeps photosynthesising.

The roots, deprived of food, die first (the shoot dies later when water uptake stops).

Answer: (4)

Out of syllabusAIPMT 2015 (Cancelled)

Keep practising — Transport in Plants

2

Transpiration and root pressure cause water to rise in plants by

  1. pushing it upward
  2. pushing and pulling it, respectively
  3. pulling it upward
  4. pulling and pushing it, respectively.
Out of syllabusAIPMT 2015 (Cancelled)
3

Which one gives the most valid and recent explanation for stomatal movement?

  1. Starch hydrolysis
  2. Guard cell photosynthesis
  3. Transpiration
  4. Potassium influx and efflux
Out of syllabusAIPMT 2015 (Cancelled)
4

Which of the following criteria does not pertain to facilitated transport?

  1. Transport saturation
  2. Uphill transport
  3. Requirement of special membrane proteins
  4. High selectivity
Out of syllabusNEET 2013
5

Function of companion cells is :

  1. Providing water to phloem
  2. Loading of sucrose into sieve elements
  3. Loading of sucrose into sieve elements by passive transport
  4. Providing energy to sieve elements for active transport
AIPMT 2011 (Mains)
6

Guttation is the result of

  1. diffusion
  2. transpiration
  3. osmosis
  4. root pressure
Out of syllabusAIPMT 2011 (Mains)
7

Guard cells help in

  1. transpiration
  2. guttation
  3. fighting against infection
  4. protection against grazing
Out of syllabusAIPMT 2009
8

The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of

  1. weak gravitational pull
  2. transpiration pull
  3. lignified thick walls
  4. cohesion and adhesion
Out of syllabusAIPMT 2008
9

Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will be

  1. no movement of water
  2. equilibrium between the two
  3. movement of water from cell A to B
  4. movement of water from cell B to A
Out of syllabusAIPMT 2007
10

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.
Out of syllabusAIPMT 2006
11

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

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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
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