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Question

For maintaining the turgidity of guard cells, a continuous supply of .......... is required.

A
Na+ and ATP
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B
K+ and ATP
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C
K+ and Na+
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D
ATP
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Solution

The correct option is C K+ and ATP

  • Guard cells help for regulating the rate of transpiration by opening and closing the stomata.
  • When the guard cells are swollen, then this turgidity is due to the accumulation of K ions in guard cells.
  • As K ion level increases, the water potential of guard cells also drops and then water enters into the guard cells.
  • Then it requires the energy which is utilized from ATP form of energy. Thus this needs a constant supply of ATP.
  • So the correct answer isK+ and ATP.
  • Correct option is B.


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