Question: According to the endosymbiotic theory, double-membrane mitochondria originated as a result of some larger eukaryotic cells with flexible membranes engulfing smaller prokaryotic cells. Which of these explains where the outer layer of the double membrane of the mitochondria originated?
Choices:
the plasma membrane of the eukaryotic host
the nuclear membrane of the eukaryotic host
the ribosomes of the engulfed prokaryotic cell
the lysosomes of the engulfed prokaryotic cell
Answer: A