Question

Circular DNA is found in

• A. Bacteria, chloroplasts and mitochondria
• B. All of the above
• C. Chloroplasts and mitochondria alone
• D. Viruses

Answer 1

The correct option is A Bacteria, chloroplasts and mitochondria

Introduction to circular DNA
Circular DNA is a double stranded helical molecule that has no ends and is a closed loop.

Viruses
Viruses are acellular structures made up of a protein coat and a genetic material which can either be linear DNA or RNA. Viruses do not possess circular DNA

Bacteria, chloroplasts and mitochondria
Circular DNA is found as extrachromosomal plasmid DNA in bacteria. The DNA present in chloroplasts and mitochondria is also circular in nature.

Final answer

(B) Bacteria, chloroplasts and mitochondria​​​​​​​