Select an incorrect statement for `F^(+)` bacteria

Options

A. It has F plasmid
B. Only plasmic pili are present
C. It is considered as donor bacterium
D. It cannot conjugate with another `F^(+)` form

Answer

### Step-by-Step Solution:

1. **Understanding F(+) Bacteria**: F(+) bacteria are those that possess the F plasmid, which is a fertility factor that allows them to transfer genetic material to other bacteria through a process called conjugation.

2. **Identifying Statements**: The question asks to select an incorrect statement about F(+) bacteria. We need to analyze each statement provided about F(+) bacteria.

3. **Statement Analysis**:
- **Statement 1**: "It has F plasmid."
- This is a correct statement. F(+) bacteria indeed have the F plasmid.

- **Statement 2**: "Only plasmic pili are present."
- This statement is incorrect. F(+) bacteria have sex pili, which are used for conjugation, not just plasmic pili.

- **Statement 3**: "It is considered as donor bacteria."
- This is a correct statement. F(+) bacteria serve as donors in the conjugation process.

- **Statement 4**: "It cannot conjugate with another F(+) bacteria."
- This is a correct statement. F(+) bacteria cannot transfer plasmids to other F(+) bacteria since they already possess the plasmid.

4. **Conclusion**: The incorrect statement is "Only plasmic pili are present," as F(+) bacteria have sex pili that facilitate the transfer of genetic material.

### Final Answer:
The incorrect statement for F(+) bacteria is: "Only plasmic pili are present."

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