Which one of the following is an energy involving process?

Options

A. endosmosis
B. exosmosis
C. `Na^(+)//K^(+)` pump
D. diffusion

Answer

To determine which of the following processes is energy-involving, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Options**:
- The options given are:
- A) Endosmosis
- B) Exosmosis
- C) Sodium-Potassium Pump
- D) Diffusion

2. **Analyzing Each Process**:
- **Endosmosis**: This is the process where water moves into the cell. It is a passive process and does not require energy.
- **Exosmosis**: This is the process where water moves out of the cell. Similar to endosmosis, it is also a passive process and does not require energy.
- **Sodium-Potassium Pump**: This is an active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients. This process requires energy in the form of ATP (adenosine triphosphate), which is hydrolyzed to provide the necessary energy.
- **Diffusion**: This is the movement of particles from an area of high concentration to an area of low concentration. It is a passive process and does not require energy.

3. **Identifying the Energy-Involving Process**:
- Among the options, the Sodium-Potassium Pump is the only process that requires energy. It actively transports ions across the cell membrane, utilizing ATP.

4. **Conclusion**:
- Therefore, the correct answer is **C) Sodium-Potassium Pump** as it is the only energy-involving process among the options provided.