Which cycle is also known as the Krebs cycle?

The Krebs cycle is commonly known as the Citric Acid Cycle. This cycle takes place in the mitochondria and is a crucial part of cellular respiration. It is responsible for the oxidation of acetyl-CoA, which is derived from carbohydrates, fats, and proteins, into carbon dioxide and, in the process, releases energy that is captured in the form of NADH and FADH2. These electron carriers then enter the electron transport chain to produce ATP, which is the energy currency of the cell.

The alternative names and cycles provided in the options do not refer to this specific process. Glycolysis is the metabolic pathway that breaks down glucose into pyruvate, the Urea Cycle is involved in disposing of ammonia from amino acid metabolism, and the Pentose Phosphate Pathway functions mainly in the production of NADPH and ribose-5-phosphate for biosynthetic reactions. These pathways, while critical to metabolism, are distinct and serve different functions than the Citric Acid Cycle, underscoring the uniqueness of the Krebs cycle in energy production and metabolic integration.