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
Choose the true statement about mit DNA: 
Select and explain. 
A. Few mutation compared to nuclear DNA, B. It has 3x109 base pairs, C. It receives 23 chromosomes from each parent, D. It codes for less than 20% of the proteins involved in respiratory chain
D: It codes for less than 20% of the proteins involved in respiratory chain
Answer: D: It codes for less than 20% of the proteins involved in respiratory chain 
Explanation: Ans. D. It codes for less than 20% of the proteins involved in respiratory chainIn ETC there are around 67 subunits, out it 13 proteins are coded by Mit DNA, which comes around 19%.Mitochondrial DNA has high mutation rate almost 5 to 10 times that of nuclear DNA.It has 16,569 bpMitochondrial DNA has maternal inheritance