BIOL 203 Lecture Notes - Lecture 7: Endergonic Reaction, Exergonic Reaction, Exergonic Process
Document Summary
Cells: miniature chemical factory, extracts energy and applies energy to perform work. Metabolism: the totality of an organisms chemical reaction: arises from orderly interactions, pathways begin with a speci c molecule, that is altered through steps, then ends with a product. Each step is catalyzed with an enzyme. Catabolic pathways: downhill: release energy by breaking down complex molecules into simpler complexes, cellular respiration: breakdown of glucose in presence of oxygen. Anabolic pathways: uphill: consume energy to build complex molecules. Bioenergetics: study of how organisms use their energy resources. Energy: capacity to cause change, prerequisite for preforming mechanical work, can be converted from type to type. Types: kinetic energy: associated with motion, potential energy: possessed as a result of location or structure. Molecules possess potential energy as result of the arrangement of their electrons in bonds: chemical energy: available for release in chemical reaction, thermal energy: kinetic energy associated with the random movement of atoms.
