Cell A has osmotic potential of -18 bars and pressure potential of 8 bars, whereas, cell B has osmotic potential of -14 bars and pressure potential 2 bars. The direction of flow of water will be

Options

A. from cell B to cell A
B. from cell A to cell B
C. no flow of water
D. in both the directions

Answer

B

Explanation

The water potential is the chemical potential of water, which is equivalent to DPD with negative sign. Therefore, water potential `(Psi_(A))` of cell A= `Psi_(A)=Psi_(s)+Psi_(P)= -18+8= -10`
water potential of cell `B(Psi_(B))=Psi_(B)=Psi_(s)=Psi_(P)= -14+2= -12`
Since, water moves from higher water potentail to lower potential the flow of water will be from cell A(-10 bars) to cell B (-12 bars).