Transport in plant NEET MCQ

 

Q76. Guard cells help in: 

(1) Transpiration 

(2) Guttation 

(3) Fighting against infection 

(4) Protection against grazing

Ans.1

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Q77. The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of 

(1) Transpiration pull 

(2) Lignified thick walls 

(3) Cohesion and adhesion 

(4) Weak gravitational pull

Ans.3

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Q78. Two cells A and B are contiguous Cell A has osmotic pressure 10 atm, turgor pressure-7atm 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) Movement of water of Cell A to B 

(2) Movement of water from Cell B to A 

(3) No movement of water 

(4) Equilibrium between the two

Ans.1

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Q79. The translocation of organic solutes in sieve tube members is supported by 

(1) Root pressure and transpiration pull 

(2) P-proteins 

(3) Mass flow involving a carrier and ATP 

(4) Cytoplasmic streaming

Ans.3

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Q80. Potometer works on the principle of

(1) Amount of water absorbed equals the amount transpired 

(2) Osmotic pressure 

(3) Root pressure 

(4) Potential difference between the tip of the tube and that of the plant

Ans.1

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Q81. When water enters in roots due to diffusion, it is termed as 

(1) Osmosis 

(2) Passive absorption 

(3) Active absorption 

(4) Endocytosis

Ans.2

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Q82. When water moves through a semipermeable membrane then which of the following pressure develops? 

(1) Osmotic pressure 

(2) Turgor pressure 

(3) Suction pressure 

(4) Wall pressure

Ans.2

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Q83. When a cell is fully turgid, which of the following will be zero? 

(1) Turgor pressure 

(2) Water potential 

(3) Wall pressure 

(4) Osmotic pressure

Ans.2

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Q84. With an increase in the turgidity of a cell, the wal pressure will 

(1) Fluctuate 

(2) Remain unchanged 

(3) Decrease 

(4) Increase 

Ans.4

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Q85. The water potential and osmotic potential of pure water are 

(1) 100 and 200 

(2) Zero and 100 

(3) 100 and zero 

(4) Zero and zero

Ans.4

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Q86. Stomatal opening is affected by 

(1) Nitrogen concentration, carbon dioxide concentration and light 

(2) Carbon dioxide concentration, temperature and light 

(3) Nitrogen concentration, light and temperature 

(4) Carbon dioxide concentration, nitrogen concentration and temperature

Ans.2

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Q87. Which of the following statements is not true for stomatal apparatus? 

(1) Inner walls of guard cells are thick 

(2) Guard cells invariably possess chloroplasts and mitochondria 

(3) Guard cells are always surrounded by subsidiary cells 

(4) Stomata are involved in gaseous exchange

Ans.3

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Q88. 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

Ans.2

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Q89. Stomata of a plant open due to 

(1) Influx of potassium ions 

(2) Eflux of potassium ions 

(3) Influx of hydrogen ions 

(4) Influx of calcium ions

Ans.1

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Q90. Stomata of CAM plants 

(1) Are always open

(2) Open during the day and close at night 

(3) Open during the night and close during the day 

(4) Never open

Ans.3