CAS BI 108 Chapter Notes - Chapter 8.2: Atp Hydrolysis, Exergonic Reaction, Hydrolysis
Document Summary
8. 2: what is the role of atp in biochemical energetics. Answer: the capture and transfer of free energy they require to do chemical work. It also can be converted into a building block for nucleic acids: atp releases a large amount of energy when hydrolyzed to adp and pi, atp can phosphorylate (donate a phosphate group) which gives the molecule energy. Two characteristics of atp account for free energy release: takes energy to get two phosphates near each other, free energy of p~o bond (phosphoric acid anhydride bond) is higher than o h bond. Cells use the energy released by atp hydrolysis to: fuel endergonic reactions, active transport, movement, and chemical light energy. This is an example of an endergonic reaction drive by atp hydrolysis. The chemical that becomes luminescent is called luciferin. Hydrolysis of atp is exergonic and yields adp and pi and free energy. Exergonic reactions in the cell can provide energy to convert adp to atp.