Sudden plasmolysis in bacteria is accompained by

Options

A. Decrease of ATP level
B. Increase of ATP level
C. Loss of ATP
D. Accumulation of `PO_4`

Answer

### Step-by-Step Solution:

1. **Understanding Plasmolysis**: Plasmolysis is a process that occurs when a cell loses water in a hypertonic solution, causing the cell membrane to pull away from the cell wall. In bacteria, this means that when they are placed in a hypertonic environment, they will lose water rapidly.

2. **Identifying the Cause**: When bacteria undergo sudden plasmolysis, it is primarily due to the osmotic movement of water out of the cell. This movement is driven by the concentration gradient between the inside of the bacterial cell and the surrounding hypertonic solution.

3. **Analyzing the Options**:
- **Option 1: Decrease of the ATP level**: This option suggests that ATP levels decrease during plasmolysis. However, plasmolysis is a passive process driven by osmosis, not an active one that would require ATP. Therefore, this option is incorrect.

- **Option 2: Increase of ATP level**: This option implies that ATP levels increase during plasmolysis. However, since plasmolysis is a passive process, there is no direct correlation with ATP production. Therefore, this option is also incorrect.

- **Option 3: Loss of ATP**: This option suggests that ATP is lost during plasmolysis. Since plasmolysis does not require energy and is a passive process, this option is also incorrect.

- **Option 4: Accumulation of phosphate**: This option suggests that there is an accumulation of phosphate during plasmolysis. There is no direct relationship between plasmolysis and phosphate accumulation, making this option incorrect as well.

4. **Conclusion**: After analyzing all the options, it becomes clear that none of the options accurately describe what happens during sudden plasmolysis in bacteria. The process is characterized by the loss of water and does not directly correlate with changes in ATP levels or phosphate accumulation.

### Final Answer:
None of the provided options accurately describe the phenomenon of sudden plasmolysis in bacteria.