Gram `Theta` bacteria possess -

Options

A. LPS + thick layer of murein
B. LPS + thin layer of murein
C. No LPS + thick murein
D. NOLPS + thin murein

Answer

### Step-by-Step Solution

1. **Understanding Gram-Negative Bacteria**:
- Gram-negative bacteria are characterized by their cell wall structure, which is different from that of gram-positive bacteria.

2. **Cell Wall Composition**:
- The cell wall of gram-negative bacteria consists of an outer membrane and a thin layer of peptidoglycan.

3. **Outer Membrane**:
- The outer membrane contains lipopolysaccharides (LPS), which are significant components that contribute to the structural integrity of the bacteria and can also act as endotoxins.

4. **Peptidoglycan Layer**:
- Beneath the outer membrane, there is a thin layer of peptidoglycan. Peptidoglycan is made up of two main components: N-acetyl glucosamine (Nag) and N-acetyl muramic acid (NAM).

5. **Periplasmic Space**:
- The space between the outer membrane and the plasma membrane is known as the periplasmic space, which contains various enzymes and proteins that assist in nutrient processing and transport.

6. **Conclusion**:
- Therefore, gram-negative bacteria possess an outer membrane with lipopolysaccharides and a thin layer of peptidoglycan.

### Final Answer
Gram-negative bacteria possess lipopolysaccharides and a thin layer of peptidoglycan.

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