A cell with DPD = 5 is surrounded by cells A , B, C and D having op and TP respectively 5 and 4 , 7 and 5,3 and 2, and zero and zero. From Which cell it will draw faster ?

Options

A. D
B. C
C. B
D. A

Answer

To solve the problem, we need to analyze the given data about the cell and its surrounding cells in terms of their DPD (Diffusion Pressure Deficit), OP (Osmotic Pressure), and TP (Turgor Pressure).

### Step-by-Step Solution:

1. **Understanding DPD**:
- DPD is calculated using the formula:
\[ \text{DPD} = \text{OP} - \text{TP} \]
- The DPD indicates the tendency of water to move into or out of the cell. A higher DPD means a stronger tendency to draw water in.

2. **Given Data**:
- The central cell has a DPD of 5.
- Surrounding cells have the following OP and TP values:
- Cell A: OP = 5, TP = 4
- Cell B: OP = 7, TP = 5
- Cell C: OP = 3, TP = 2
- Cell D: OP = 0, TP = 0

3. **Calculating DPD for Surrounding Cells**:
- For Cell A:
\[ \text{DPD}_A = OP - TP = 5 - 4 = 1 \]
- For Cell B:
\[ \text{DPD}_B = OP - TP = 7 - 5 = 2 \]
- For Cell C:
\[ \text{DPD}_C = OP - TP = 3 - 2 = 1 \]
- For Cell D:
\[ \text{DPD}_D = OP - TP = 0 - 0 = 0 \]

4. **Summary of DPD Values**:
- DPD of Cell A = 1
- DPD of Cell B = 2
- DPD of Cell C = 1
- DPD of Cell D = 0

5. **Identifying the Cell with Lowest DPD**:
- The lowest DPD among the surrounding cells is for Cell D, which has a DPD of 0.

6. **Conclusion**:
- Water will move from the cell with the lowest DPD to the cell with the highest DPD. Therefore, the cell will draw water fastest from Cell D.

### Final Answer:
The cell will draw water fastest from **Cell D**.