The osmostic potential of cell ‘X’ 1s -5 MPa and that of cell ‘Y’ is -12 MPa, the pressure potential of cell “X’ is 4 MPa and that of cell ‘Y’ is 4 MPa. Therefore, water

Options

A. Shows no movement
B. Moves in both directions
C. Moves from cell ‘X’ to cell 'Y’
D. Moves from cell 'Y’ to cell ‘X’

Answer

To solve the problem regarding the direction of water movement between two cells based on their osmotic and pressure potentials, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Given Values**:
- For Cell X:
- Osmotic Potential (Ψs) = -5 MPa
- Pressure Potential (Ψp) = 4 MPa
- For Cell Y:
- Osmotic Potential (Ψs) = -12 MPa
- Pressure Potential (Ψp) = 4 MPa

2. **Calculate Water Potential for Cell X**:
- The formula for water potential (Ψw) is:
\[ Ψw = Ψs + Ψp \]
- For Cell X:
\[ Ψw (X) = -5 MPa + 4 MPa = -1 MPa \]

3. **Calculate Water Potential for Cell Y**:
- Using the same formula:
- For Cell Y:
\[ Ψw (Y) = -12 MPa + 4 MPa = -8 MPa \]

4. **Compare Water Potentials**:
- Water moves from an area of higher water potential to an area of lower water potential.
- Here, Ψw (X) = -1 MPa (higher water potential) and Ψw (Y) = -8 MPa (lower water potential).

5. **Determine Direction of Water Movement**:
- Since water moves from higher to lower water potential, water will move from Cell X to Cell Y.

### Final Answer:
Water will move from Cell X to Cell Y.

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