CBSE  /  Class 11  /  Biology  /  Transport in Plants

  • 1. 
    Dry seeds kept in water swell due to

  • absorption
  • diffusion
  • imbibition
  • none of these

  • 2. 
    Which of the following is the unit of ψ?

  • Pascal
  • Joule
  • Newton
  • Electron volt

  • 3. 
    Which of the following is decreased during increase in humidity in the atmosphere?

  • Transpiration
  • Photosynthesis
  • Respiration
  • Glycolysis

  • 4. 
    Two types of molecules cross the membrane in the same direction, it is called as

  • Uniport
  • Symport
  • Antiport
  • Multiport

  • 5. 
    Diffusion rate is affected by

  • temperature
  • membrane permeability
  • gradient of concentration
  • all of these

  • 6. 
    Cells shrink in _________ solution.

  • isotonic
  • hypotonic
  • hypertonic
  • hypotonic and hypertonic

  • 7. 
    Which of the following is true about diffusion?

  • There is no expenditure of energy.
  • Molecules move in Brownian motion.
  • Substances moves from the region of higher concentration to the region of lower concentration.
  • Diffusion depends on the type of living system.

  • 8. 
    Which of the following is true about diffusion?

  • There is no expenditure of energy.
  • Molecules move in Brownian motion.
  • Substances moves from the region of higher concentration to the region of lower concentration.
  • Diffusion depends on the type of living system.

  • 9. 
    Water is lost in a liquid state in some plants through hydathodes. These hydathodes

  • do not show any specificity in opening and closing
  • remain closed during day
  • remain closed at night
  • remain always open

  • 10. 
    If pressure greater than atmospheric pressure is applied to pure water, the water potential

  • increases
  • decreases
  • remains same
  • atmospheric pressure does not affect water potential
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