Cellular Respiration (Mitochondrial ATP Production)

Cellular respiration is a fundamental metabolic pathway in which cells convert biochemical energy from nutrients, primarily glucose, into adenosine triphosphate (ATP), the main energy currency of the cell. In eukaryotic cells, most ATP production occurs within mitochondria through a series of tightly regulated biochemical processes. The process consists of glycolysis, pyruvate oxidation, citric acid cycle, and oxidative phosphorylation. The electron transport chain uses electrons from NADH/FADH₂ to pump protons across membrane creating an electrochemical gradient, which drives ATP synthase to synthesize ATP from ADP + Pi.

Varies depending on the specific drug or inhibitor; examples include disrupting the proton gradient, blocking electron transfer, or directly inhibiting ATP synthase.