According to the Endosymbiotic Theory of the Origin of Eukaryotic

question 1

Multiple Choice

According to the endosymbiotic theory of the origin of eukaryotic cells, how did mitochondria originate?

• A) from infoldings of the plasma membrane, coupled with mutations of genes for proteins in energy-transfer reactions
• B) from engulfed, originally free-living proteobacteria
• C) by secondary endosymbiosis
• D) from the nuclear envelope folding outward and forming mitochondrial membranes
• E) when a protoeukaryote engaged in a symbiotic relationship with a protocell