This is a theory proposed by Lynn Margulis that states that mitochondria arose from an endosymbiotic event where a bacterium was engulfed by a host cell and was still viable. Some of the evidence for this theory is that mitochondria have their own DNA which is circular and has 70S ribosomes which are the bacterial ribosomes.

University of Wisconsin - Madison

The mitochondria is responsible for aerobic respiration in eukaryotes. It contains two lipid membranes which are the inner and outer membranes. The inner membrane is the site for the electron transport chain for aerobic respiration. The mitochondrial matrix is also an important site for metabolic enzymes and the mitochondrial DNA.

Mitochondria

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

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