When is o2 oxidized in cellular respiration

Cells produce energy in the form of ATP through the process of cellular respiration. Although much of the energy from cellular respiration is released as heat, some of it is used to make ATP. During cellular respiration, several oxidation-reduction redox reactions transfer electrons from organic molecules to other molecules.

Here, oxidation refers to electron loss and reduction to electron gain. Some prokaryotes use anaerobic respiration, which does not require oxygen. Most organisms use aerobic oxygen-requiring respiration, which produces much more ATP. Aerobic respiration generates ATP by breaking down glucose and oxygen into carbon dioxide and water.

Both aerobic and anaerobic respiration begin with glycolysis, which does not require oxygen. Glycolysis breaks down glucose into pyruvate, yielding ATP. Importantly, several types of yeast use alcoholic fermentation. Human muscle cells can use lactic acid fermentation when oxygen is depleted.

Anaerobic respiration ends with fermentation. Aerobic respiration, however, continues with pyruvate oxidation. Pyruvate oxidation generates acetyl-CoA, which enters the citric acid cycle. The final stage of cellular respiration, oxidative phosphorylation, generates most of the ATP. The electron transport chain releases energy that is used to expel protons, creating a proton gradient that enables ATP synthesis.

Lane, N. Martin, W. The Origin of Mitochondria. Nature Education 3 9 To learn more about our GDPR policies click here. If you want more info regarding data storage, please contact gdpr jove. Your access has now expired. Provide feedback to your librarian. If you have any questions, please do not hesitate to reach out to our customer success team. Login processing Chapter 8: Cellular Respiration.

Chapter 1: Scientific Inquiry. Chapter 2: Chemistry of Life. Chapter 3: Macromolecules. Chapter 4: Cell Structure and Function. Chapter 5: Membranes and Cellular Transport. Chapter 6: Cell Signaling. Chapter 7: Metabolism. Chapter 9: Photosynthesis. What is Ethanolic Potassium Hydroxide? How To Prepare Potassium Chloride. How to Calculate a Rate Constant. Safe Combustion Reaction Experiments. Role of Enzymes in Cellular Respiration. Organelles Involved in Photosynthesis. Three Types of Aqueous Reactions.

How to Know if a Substance is a Reducing Agent or Steps in Finding Percent Yield. How Does Photosynthesis Benefit Heterotrophs? How does aerobic respiration release energy from glucose?

How do cellular respiration and breathing differ? What gets oxidized during glycolysis? How is glycolysis related to the citric acid cycle? What are the steps of glycolysis? What is glycolysis?