LIFESCI 2 Lecture Notes - Lecture 4: Kinetic Energy, Thermodynamics, Potential Energy
28 Oct 2016
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Document Summary
Biogenetics is the flow of energy in biochemical systems. Energy is defined as the capacity to do work: work in a cell refers to chemical processes, ion pumps, etc. Potential energy (stored energy) energy stored in molecules, the arrangement of chemicals in a cell, concentration gradients, etc. Kinetic energy (movement) protein packing, diffusion, breaking bonds, etc. After energy transformation the amount of energy available to do work is less (there is some amount of unusable energy will be emitted as heat) Muscles convert potential energy into kinetic energy. According to the laws of thermodynamics, of the p. e converted into ke that generates movement of the arm. (a) all (b) some (c ) none. Answer: (b) some *the unusable energy is high entropy energy. More heat more molecule movement more disorder = higher entropy. In the process shown below, many individual glucose sugar molecules are covalently bonded together to form a single, large molecule of glycogen (ring structures).
