If a cell A with DPD 4 bars is connected to cell B, C, D whose osmotic pressure and turgor pressure are respectively 4 and 4, 10 and 5, 7 and 3 bar, the flow of water will be:
A
B to A, C and D
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B
A to D, B and C
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C
C to A, B and D
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D
A to B, C and D
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Solution
The correct option is A B to A, C and D DPD = OP-TP Cell A DPD = 4 bars Cell B DPD = 4-4 =0 bar Cell C DPD = 10-5 = 5 bars Cell D DPD = 7-3 = 4 bars Water moves from low DPD to high DPD. Cell B has the lowest DPD so water moves from B to A, C and D.