Which of the following equations is correct in respect of osmotic phenomenon

Options

A. DPD=OP-TP
B. DPD=OP+TP
C. `DPD=OPxxTP`
D. `DPD=OPdivTP`

Answer

To solve the question regarding the correct equation in respect of the osmotic phenomenon, we will analyze the terms involved and their relationships.

### Step-by-Step Solution:

1. **Understand the Terms**:
- **DPD (Diffusion Pressure Deficit)**: This is the difference in diffusion pressure between pure water and a solution. It indicates the tendency of water to move from a region of higher water potential (pure water) to a region of lower water potential (the solution).
- **TP (Turgor Pressure)**: This is the pressure exerted by the fluid (usually water) inside the cell against the cell wall. It is a result of water entering the cell and is crucial for maintaining cell structure.
- **OP (Osmotic Pressure)**: This is the pressure required to prevent the flow of water into a solution through a semipermeable membrane. It reflects the concentration of solutes in the solution.

2. **Establish the Relationship**:
- The relationship between these three terms can be summarized as follows:
- DPD is the difference between osmotic pressure (OP) and turgor pressure (TP).
- When water enters a cell, it increases the turgor pressure, which in turn affects the diffusion pressure deficit.

3. **Formulate the Equation**:
- The correct equation that represents this relationship is:
\[ DPD = OP - TP \]
- This means that the diffusion pressure deficit is equal to the osmotic pressure minus the turgor pressure.

4. **Choose the Correct Option**:
- From the options provided, the first option states:
- **DPD = OP - TP**
- This is the correct equation in respect of the osmotic phenomenon.

### Final Answer:
The correct equation in respect of the osmotic phenomenon is:
**DPD = OP - TP** (Option 1).

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