AP BIOLOGY

Detailed explanation-1: -Water and carbon dioxide are released as byproducts. The three stages of aerobic cellular respiration are glycolysis (an anaerobic process), the Krebs cycle, and oxidative phosphorylation.

Detailed explanation-2: -Thus, if oxygen is not present, the respiratory cycle cannot function, which shuts down the Krebs cycle. For this reason, the Krebs cycle is considered an aerobic pathway for energy production.

Detailed explanation-3: -Under anaerobic conditions, especially during fermentative growth, during which NADH cannot be reoxidized by the respiratory chain, Krebs cycle activity is reduced to the minimum level needed to supply biosynthetic pathways and is transformed from a cyclic pathway to two oppositely oriented half-cycles.

Detailed explanation-4: -Overview of the Krebs or citric acid cycle, which is a series of reactions that takes in acetyl CoA and produces carbon dioxide, NADH, FADH2, and ATP or GTP.

Detailed explanation-5: -Krebs Cycle is a Part of Cellular Respiration Cellular respiration is a four-stage process. In the process, glucose is oxidized to carbon dioxide and oxygen is reduced to water. The energy released in the process is stored in the form of ATPs. 36 to 38 ATPs are formed from each glucose molecule.