Anaerobic ATP Formation

Three Types of Organisms Aerobes – use oxygen and can’t survive without it (us – can be anaerobic if necessary) Anaerobes – cannot survive in the presence of oxygen; strictly anaerobes (tetanus & botulism) Facultative anaerobes – can use oxygen if present or they can be anaerobic or they are anaerobic but not harmed by oxygen (yogurt)

Anaerobic Pathways No oxygen AKA – Fermentation Occurs in some bacteria and protists that live in marshes, swamps, mud, deep-sea sediments, digestive systems, and sewage treatment plants

The Beginning: Glycolysis Glucose is split into two pyruvate molecules Occurs in the cytoplasm 2 ATP molecules are needed to start the reaction 4 ATP and 2 NADH molecules are produced

Pyruvic Acid Glucose

Lactate Pyruvic Acid Glucose

Lactate Pyruvic Acid Glucose Ethyl Alcohol Acetaldehyde

Anaerobic Electron Transport Occurs in some bacteria Electrons may move through transport systems in the plasma membrane and an inorganic compound in the environment is the final electron acceptor