Read the following statements and choose the correct option.
(i) Mycoplasma lacks a cell membrane.
(ii) Mycoplasma are the smallest living cells to exist on the planet.
(iii) Mycoplasma survives only without oxygen.

Options

A. (i) and (iii) correct
B. (ii) and (iii)incorrect
C. (i) and (ii) incorrect
D. (ii) and (iii) incorrect

Answer

To determine which statements about Mycoplasma are correct or incorrect, let's analyze each statement step by step.

### Step-by-Step Solution:

1. **Statement (i): Mycoplasma lacks a cell membrane.**
- **Analysis**: Mycoplasma is a unique type of bacteria that does not have a cell wall; however, it does possess a cell membrane. The cell membrane is essential for maintaining the integrity of the cell and regulating the movement of substances in and out of the cell.
- **Conclusion**: This statement is **incorrect**.

2. **Statement (ii): Mycoplasma are the smallest living cells to exist on the planet.**
- **Analysis**: Mycoplasma are indeed the smallest known living cells. They are prokaryotic organisms and are smaller than many other bacteria, making them the smallest cells currently recognized in biology.
- **Conclusion**: This statement is **correct**.

3. **Statement (iii): Mycoplasma survives only without oxygen.**
- **Analysis**: Mycoplasma can survive in anaerobic conditions, meaning they do not require oxygen for their survival. They are known to be facultative anaerobes, which means they can grow in the absence of oxygen.
- **Conclusion**: This statement is **correct**.

### Final Evaluation:
- **Statement (i)**: Incorrect
- **Statement (ii)**: Correct
- **Statement (iii)**: Correct

### Correct Option:
The correct option includes statements (ii) and (iii) as true.

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