Cell respiration transfers energy from organic compounds into ATP through glycolysis, anaerobic pathways and aerobic mitochondrial stages, supporting usable cellular work and measurable biological activity.
Coverage 2010–2025 · Updated 15 Jul 2026
• ATP is a small soluble nucleotide and universal energy currency
• It links energy-yielding respiration to energy-requiring cellular processes
• ATP supplies active transport, anabolic synthesis, and movement
• Examples include membrane pumps, macromolecule synthesis, and chromosome movement
• ATP hydrolysis to ADP and phosphate releases energy for coupled reactions
• Respiration phosphorylates ADP to ATP; ATP is recycled rather than stored
• Cell respiration is enzyme-controlled release of energy from organic compounds
• Carbon compounds are oxidized stepwise so energy can be transferred to ATP
• Aerobic respiration uses oxygen and mitochondria, producing CO₂, water, and high ATP
• Anaerobic respiration in human cytoplasm produces lactate and low ATP
• Rate depends on metabolic demand, organism size, oxygen, substrate, temperature, and pH
• Respirometers measure oxygen uptake while soda lime absorbs CO₂
