Which statement is not true about bacteria ?

Options

A. Bacterial cells are morphologically much simpler than eukaryotic cells
B. The cytoplasm of bacterial cell contains several structures that are not enclosed with membrane
C. Capsule of bacterial cell provides protection.
D. Oxygenic photosynthesis is most common in eubacteria.

Answer

### Step-by-Step Solution:

1. **Understanding Bacteria**: Bacteria are single-celled organisms that belong to the prokaryotic domain. They are simpler in structure compared to eukaryotic cells, which have membrane-bound organelles.

2. **Evaluating the Statements**:
- **Statement 1**: "Bacteria cells are morphologically much simpler than eukaryotic cells."
- This statement is true. Bacterial cells lack membrane-bound organelles and are generally simpler than eukaryotic cells.

- **Statement 2**: "The cytoplasm of a bacterial cell contains several structures that are not enclosed with a membrane."
- This statement is also true. Bacterial cytoplasm contains ribosomes and other structures that are not membrane-bound.

- **Statement 3**: "The capsule of the bacteria cell provides protection."
- This statement is true. The capsule is a protective layer that surrounds the cell wall of some bacteria and is made of polysaccharides.

- **Statement 4**: "Oxygenic photosynthesis is the most common in eubacteria."
- This statement is not true. Oxygenic photosynthesis primarily occurs in plants, algae, and cyanobacteria, not in eubacteria.

3. **Conclusion**: The statement that is not true about bacteria is: "Oxygenic photosynthesis is the most common in eubacteria."