Adenosine 5-triphosphate (ATP) The carrier of free energy in cells.
Bioenergetics The study of energy relationships in living systems.
Chloroplasts The sites of photosynthesis in green plants.
Ion transport The movement of ions across biological membranes.
Metabolism The total of all reactions that occur in cells. Catabolic metabolism is generally degradative and ex-ergonic, whereas anabolic metabolism is synthetic and requires energy.
Mitochondria Sites of oxidative (catabolic) metabolism in cells.
Photosynthesis Light-driven synthesis of organic molecules from carbon dioxide and water.
Plasma membrane The barrier between the inside of cells and the external medium.