AP BIOLOGY

Detailed explanation-1: -Cellular respiration is a catabolic process during which glucose is broken down to release usable energy for a cell. As in all catabolic processes, cellular respiration releases energy which can then be harnessed and used by other reactions in the cell.

Detailed explanation-2: -Cellular respiration is a collection of three unique metabolic pathways: glycolysis, the citric acid cycle, and the electron transport chain. Glycolysis is an anaerobic process, while the other two pathways are aerobic.

Detailed explanation-3: -Metabolic pathways can be broadly divided into two categories based on their effects. Photosynthesis, which builds sugars out of smaller molecules, is a “building up, ” or anabolic, pathway. In contrast, cellular respiration breaks sugar down into smaller molecules and is a “breaking down, ” or catabolic, pathway.

Detailed explanation-4: -Cellular metabolism has two distinct divisions: anabolism and catabolism. Anabolism is a constructive metabolic process in which a cell uses energy to construct molecules such as enzymes and nucleic acids and perform other essential life functions.

Detailed explanation-5: -Respiration is considered to be a catabolic reaction because: It involves breaking down complex biomolecular substances such as glucose. The initial breakdown of glucose occurs in the cytoplasm where it is broken down into pyruvate. Then the pyruvate molecules are broken down either aerobically or anaerobically.