This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Molecular Genetics, Subject name: Biochemistry
Mitochondrial DNA is: 
Select and explain. 
A. Circular double stranded, B. Circular single stranded, C. Linear double helix, D. None of these
A: Circular double stranded
Answer: A: Circular double stranded 
Explanation: Ans A. Circular double strandedMitochondria and chloroplast are the only two semi -autonomous organelles present in the cell. And DNA present is circular double stranded.