Which is possible for a fully turgid cell ?

Options

A. (a) DPD= 10 atm, OP =15 atm, TP=5atm
B. (b) DPD= 0.2 atm , OP =0.7 atm, TP=0.5 atm
C. (c) DPD =0.0atm , OP =15atm , TP= 15 atm
D. (d) DPD=5atm , OP=12 atm , TP=7 atm

Answer

To determine which condition is possible for a fully turgid cell, we need to understand the concepts of osmotic potential (OP), turgor pressure (TP), and diffusion pressure deficit (DPD).

### Step-by-step Solution:

1. **Understanding Turgidity**:
- A fully turgid cell is one that has absorbed water to the point where the vacuole is full, causing the cell membrane to push against the cell wall. This pressure is known as turgor pressure (TP).

2. **Defining Key Terms**:
- **Osmotic Potential (OP)**: This is the potential of water to move into a cell due to solute concentration. It is a measure of the tendency of water to move into the cell.
- **Turgor Pressure (TP)**: This is the pressure exerted by the fluid (water) inside the vacuole against the cell wall.
- **Diffusion Pressure Deficit (DPD)**: This is calculated using the formula:
\[ \text{DPD} = \text{OP} - \text{TP} \]
- In a fully turgid cell, the osmotic pressure is equal to the turgor pressure.

3. **Analyzing the Conditions**:
- For a fully turgid cell, the osmotic pressure (OP) and turgor pressure (TP) are equal. Therefore, when calculating DPD:
\[ \text{DPD} = \text{OP} - \text{TP} = 0 \]
- This indicates that the cell is in a hypotonic environment where water enters the cell, maintaining turgidity.

4. **Evaluating the Options**:
- Given the options, we need to find the one where DPD is equal to 0, as this is the condition for a fully turgid cell.
- The correct option states that DPD is 0, which aligns with our understanding.

5. **Conclusion**:
- The correct answer is that for a fully turgid cell, the DPD is 0.

### Final Answer:
The possible condition for a fully turgid cell is that the Diffusion Pressure Deficit (DPD) is 0.

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