The bacteria which can trap solar energy for synthesizing ATP but can not utilize it for making food are

Options

A. thermophiles
B. thermoacidophiles
C. methanogens
D. halophiles

Answer

To solve the question about the type of bacteria that can trap solar energy for synthesizing ATP but cannot utilize it for making food, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a specific type of bacteria that can capture solar energy to produce ATP but does not use that energy to create food.

2. **Identify Key Terms**:
- **Trap Solar Energy**: This refers to the ability of certain organisms to harness sunlight.
- **Synthesize ATP**: ATP (adenosine triphosphate) is the energy currency of cells, indicating that the bacteria can produce energy.
- **Cannot Utilize for Making Food**: This means that while they can produce ATP, they do not convert solar energy into organic compounds (food).

3. **Review the Options**:
- **A. Thermophiles**: These are heat-loving bacteria but do not specifically relate to solar energy trapping.
- **B. Thermoacidophiles**: These thrive in hot and acidic environments, but again, they do not specifically trap solar energy.
- **C. Methanogens**: These are anaerobic bacteria that produce methane but do not trap solar energy.
- **D. Halophiles**: These are salt-loving bacteria that can trap solar energy for ATP synthesis but do not use it to make food.

4. **Evaluate Halophiles**:
- Halophiles are known for their ability to survive in high-salinity environments.
- Some halophiles are phototrophic, meaning they can capture solar energy to produce ATP using a process involving ATP synthase.
- However, they do not utilize this energy for food production, aligning perfectly with the question's requirements.

5. **Conclusion**: Based on the evaluation, the correct answer is **D. Halophiles**.

### Final Answer:
The bacteria which can trap solar energy for synthesizing ATP but cannot utilize it for making food are **Halophiles** (Option D).

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