In prokaryotes in addition to the genomic DNA small circular DNA are present outside these structures are called as

Options

A. plasmids
B. nucleoid
C. chromosomes
D. mesosomes

Answer

To answer the question about small circular DNA present in prokaryotes, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Prokaryotic Structure**:
- Prokaryotes are unicellular organisms that lack a membrane-bound nucleus. Their genetic material is typically found in a single, circular strand of DNA known as genomic DNA.

2. **Identifying Additional DNA**:
- In addition to the genomic DNA, prokaryotes often contain small, circular pieces of DNA that are separate from the chromosomal DNA.

3. **Defining the Small Circular DNA**:
- These small circular DNA molecules are known as **plasmids**. Plasmids can replicate independently of the chromosomal DNA and often carry genes that provide advantages to the bacteria, such as antibiotic resistance.

4. **Evaluating Other Options**:
- **Nucleotide**: This is a building block of DNA and RNA, not a separate DNA structure.
- **Chromosome**: This refers to the main genetic material in prokaryotes, which is the genomic DNA, not the small circular DNA.
- **Mesosomes**: These are infoldings of the plasma membrane in prokaryotes and are not related to DNA.

5. **Conclusion**:
- Therefore, the correct answer to the question is that the small circular DNA present in prokaryotes is called **plasmids**.

### Final Answer:
The small circular DNA present outside the genomic DNA in prokaryotes is called **plasmids**.

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