Halobacteria :
Halobacteria :
A
are gram positive bacteria
B
synthesize purple red pigments in light and oxygen deficiency
C
are found in highly acidic medium
D
produce methane in anaerobic condition
Text Solution
AI Generated Solution
The correct Answer is:
**Step-by-Step Solution:**
1. **Understanding Halobacteria**: Halobacteria are a type of extremophilic microorganisms that thrive in high-salinity environments. They belong to the Archaea domain and are known for their unique adaptations to extreme conditions.
2. **Evaluating the Options**:
- **Option 1**: "Halobacteria are gram-positive bacteria." This statement is incorrect. Halobacteria are classified as gram-negative bacteria due to their cell wall structure.
- **Option 2**: "Halobacteria synthesize purple-red pigments in light and oxygen deficiency." This statement is correct. Halobacteria contain retinal proteins that allow them to capture light energy, leading to the synthesis of purple-red pigments.
- **Option 3**: "Halobacteria are found in highly acidic medium." This statement is incorrect. Halobacteria are not typically found in acidic environments; instead, they thrive in saline (salty) conditions.
- **Option 4**: "Halobacteria produce methane in anaerobic conditions." This statement is also incorrect. While some archaea produce methane, Halobacteria are not known for this capability.
3. **Conclusion**: Based on the evaluation of the options, the only correct statement about Halobacteria is the second one, which highlights their ability to synthesize purple-red pigments in light and oxygen deficiency.
**Final Answer**: The correct answer is Option 2.
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