BMB 208 Lecture Notes - Lecture 12: Phosphate, Endothermic Process, Phosphoenolpyruvic Acid
2 Jan 2018
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Document Summary
M. 1 catabolism, anabolism, and the atp cycle: metabolism is the sum of all chemical processes that occur in an organism, catabolism: metabolic pathways that break down complex molecules into simpler ones. Catabolism produces energy. (oxidation of carbon: anabolism: metabolic pathways that build complex molecules from simpler ones. Anabolism consumes energy: abcd- anabolism is building, catabolism is destroying. Energy: 4. 186 kj (joules)= 1 kcal, hydrolyzing atp into adp and inorganic phosphate ion pi releases 7. 3 kcal/mol, contrarily, producing atp from adp and pi requires 7. 3 kcal/mol. Linked phosphate groups: hydrolysis of the phosphoanhydride bonds of atp releases usable energy because the products of the reaction (adp and inorganic phosphate) are much more stable (low energy) than unhydrolyzed atp. Atp cycle and energy coupling: energy from exothermic catabolic reactions can be used to produce atp. Ex: hydrolysis of phosphoenolpyruvate (a step in glucose breakdown) is coupled to the synthesis of atp from.
