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Question

The solute potential of a plant cell is -17 bar, and its pressure potential is 5 bar. Determine the water potential. 
  1. 12
  2. -22
  3. -12
  4. 22


Solution

The correct option is C -12
Here,
solute potential (𝜓s) = -17 bar
pressure potential (𝜓p) = 5 bar

Now, water potential is given by: 
𝜓 = 𝜓p + 𝜓s
= 5+ (-17)
= - 12 bar
 

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