Thermoacidophiles are capable of withstanding extremely low pH and high temperature due to the

Options

A. Presence of branched chain of lipid in cell membrane
B. Presence of resistant enzyme which can operate in basic conditions
C. Presence of higher concentration of KCl in their cells
D. More than one option is correct

Answer

**Step-by-Step Solution:**

1. **Understanding Thermoacidophiles**: Thermoacidophiles are a type of extremophilic microorganisms that thrive in environments with high temperatures and low pH levels. They are often found in hot springs and acidic environments.

2. **Identifying Key Characteristics**: The key characteristics that allow thermoacidophiles to survive in such extreme conditions include their unique cellular structures and biochemical adaptations.

3. **Analyzing the Options**:
- **Option A**: Presence of branched chain of lipid in cell membrane. This is a significant adaptation that helps maintain membrane integrity at high temperatures.
- **Option B**: Presence of resistant enzyme which can operate in basic conditions. This option is less relevant, as thermoacidophiles are adapted to acidic conditions rather than basic.
- **Option C**: Presence of higher concentration of KCl in their cells. While some extremophiles may have adaptations involving ions, this is not the primary reason for thermoacidophiles' survival in extreme conditions.
- **Option D**: More than one option is correct. This is not applicable since only one option directly addresses the unique adaptations of thermoacidophiles.

4. **Conclusion**: The primary reason thermoacidophiles can withstand extremely low pH and high temperature is due to the presence of branched chain lipids in their cell membrane, which helps stabilize the membrane structure under extreme conditions. Therefore, the correct answer is **Option A**.

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