Dive into a comprehensive biology video tutorial that provides a basic introduction to cellular respiration. Explore the four principal stages: glycolysis, pyruvate oxidation, the Krebs cycle, and the electron transport chain. Learn about anaerobic cellular respiration, including lactic acid fermentation and ethanol fermentation. Understand key concepts such as ATP (Adenosine Triphosphate), substrate level phosphorylation, oxidation and reduction reactions, and the role of enzymes like kinase and isomerase. Discover the intricacies of the mitochondrial matrix, intermembrane space, and the process of oxidative phosphorylation. Engage with numerous examples and practice problems to reinforce your understanding of these essential biological processes.