Select incorrect statement regarding prokaryotes.

Options

A. There is no well- defined nucleus
B. Genomic DNA is single chromosome/ circular
C. Many bacteria have small circular DNA outside the genomic DNA
D. The plasmid DNA confers no phenotypic characters to such bacteria

Answer

To solve the question regarding the incorrect statement about prokaryotes, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Prokaryotes**: Prokaryotes are unicellular organisms that lack a well-defined nucleus. Their genetic material is not enclosed within a nuclear membrane.

2. **Evaluate the Statements**:
- **Statement 1**: "There is no well-defined nucleus."
- This statement is correct. Prokaryotes do not have a well-defined nucleus.

- **Statement 2**: "Genomic DNA is a single chromosome or circular DNA."
- This statement is also correct. Prokaryotic DNA is typically circular and consists of a single chromosome.

- **Statement 3**: "Many bacteria have small circular DNA outside the genomic DNA."
- This statement is correct as well. Many bacteria contain plasmids, which are small circular DNA molecules separate from the chromosomal DNA.

- **Statement 4**: "The plasmid DNA confirms no phenotypic characters to such bacteria."
- This statement is incorrect. Plasmids can indeed carry genes that confer phenotypic traits, such as antibiotic resistance.

3. **Identify the Incorrect Statement**: From the evaluation, the fourth statement is the incorrect one regarding prokaryotes.

### Final Answer:
The incorrect statement regarding prokaryotes is: "The plasmid DNA confirms no phenotypic characters to such bacteria."

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