01:119:115 Lecture 7: Lecture 7

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:115
• Professor: Professor Cardinale

Document Summary

A. definition and basic information: energy (e)- the capacity to do work or supply heat, two forms of e, kinetic e- e of motion, potential e- stored e; capacity to do work. A. ultimate source of e for living systems: sunlight. B. what cells need to do: mechanical work- movement, transport work- active transport, chemical work- form or break bonds. C. e in cells (figure 5. 2: potential e- stored in covalent bonds, kinetic e- released when bonds are broken. F. endergonic reactions: (cid:730)g is positive: energy in. , potential e in reactants < potential e in products, r + e = p, this is a gain of free e -> work was done, example: anabolic reactions. G. exergonic versus endergonic (figure 8. 6 #important: exergonic, e is released, spontaneous, endergonic, e is inputted/stored, requires e input, so not spontaneous. A. coupled reactions: pair an endergonic reaction (requires e) with an exergonic reaction to provide the e to drive the endergonic reaction, exergonic reaction often involves atp.