Question

Which of the following is associated with Lynn Margulis's endosymbiotant theory?

• A. Mitochondria DNA is more like that of bacteria than the nuclear DNA in human cells.
• B. Chloroplasts replicate on their own time schedule, not under nuclear control.
• C. Mitochondria and chloroplasts are about the same size as prokaryotes.
• D. All of the above.
• E. None of the above.

Answer 1

The correct option is D All of the above.

Endosymbiosis of colorless and blue green cyanobacterium into another bacterium gave rise to mitochondria and chloroplast respectively. Presence of mitochondria allowed oxygenic respiration which was favoured over anaerobic oxidation of organic compounds owing to its high energy yield. These are the semiautonomous organelles and have a proakryotic DNA which is replicated indepedent of nuclear DNA. Mitochondria and chroloplast are among the biggest organelles and are about of same size as proakryotes. Thus, the correct answer is option D.