Which of the following can utilize light energy for the synthesis of ATP :–

Options

A. Slime molds
B. Cephaleuros
C. Halophiles
D. Thermoacidophils

Answer

To determine which of the listed organisms can utilize light energy for the synthesis of ATP, we will analyze each option step by step.

### Step 1: Understand the options
The options given are:
1. Slime molds
2. Cephalorhynchs
3. Halophiles
4. Thermo-acidophiles

### Step 2: Analyze each organism
- **Slime molds**: These are not photosynthetic organisms. They are more related to fungi and do not utilize light energy for ATP synthesis.

- **Cephalorhynchs**: These are a group of marine animals and are also not known to utilize light energy for ATP synthesis. They are more related to the animal kingdom and rely on organic matter for energy.

- **Halophiles**: These are extremophiles that thrive in high salt concentrations. Some halophiles, particularly certain types of archaea, contain proteins called bacteriorhodopsins. These proteins can capture light energy and create a proton gradient, which is then used to synthesize ATP.

- **Thermo-acidophiles**: These are also extremophiles that thrive in hot, acidic environments. They do not utilize light energy for ATP synthesis but rather rely on chemical energy from their environment.

### Step 3: Conclusion
Based on the analysis, the organism that can utilize light energy for the synthesis of ATP is **Halophiles**.

### Final Answer
**Halophiles (Option 3)** can utilize light energy for the synthesis of ATP.

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