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Mitochondrial DNA is :-...

Mitochondrial DNA is :-

A

Naked

B

Circular

C

Double stranded

D

All the above

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Mitochondrial DNA**: Mitochondrial DNA (mtDNA) is found in the mitochondria of eukaryotic cells. Unlike nuclear DNA, mtDNA has distinct characteristics. 2. **Characteristics of Mitochondrial DNA**: - **Naked**: Mitochondrial DNA is not associated with histone proteins, which means it is "naked." In contrast, nuclear DNA is wrapped around histones to form nucleosomes. - **Circular**: Mitochondrial DNA is circular in structure, similar to the DNA found in prokaryotes (bacteria). This circular shape is different from the linear structure of nuclear DNA. - **Double-stranded**: Mitochondrial DNA consists of two strands, making it double-stranded, just like nuclear DNA. 3. **Comparison with Nuclear DNA**: While nuclear DNA is organized into chromosomes and associated with histones, mitochondrial DNA is considered extra-chromosomal DNA due to its unique structure and lack of histones. 4. **Conclusion**: Given the characteristics of mitochondrial DNA, it is accurate to state that mitochondrial DNA is naked, circular, and double-stranded. Therefore, the correct answer to the question is "all of the above." **Final Answer**: Mitochondrial DNA is naked, circular, double-stranded – all of the above. ---
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