BIOL 1001 Chapter : Unit 2 Biology 1201
Document Summary
A reaction in which the enthalpy increases and entropy decreases will always be: spontaneous, non-spontaneous. Living systems vs. non-living systems: non-living, less organized, lower energy, very slow, living, highly organized, higher energy, fast. How do living systems accomplish this: external energy source (sun, organic catalysts (enzymes) Why is enzyme inhibition an important topic: regulation. What do roundup and viagra have in common: both enzymes but diff purposes. Cells (minimum organisms of living matter: cell membrane models (plasma membrane), all cells have a think outer covering, early model inferred the structure from chemistry and permeability property of the membrane, fluid-mosaic model: Cell coats: not a separate entity from the cell membrane; glycocalyx, composed of glycolipids, glycoproteins function: cell recognition. Diffusion: physical property of matter, individual molecules move randomly, but the net effect is non- random, what force causes the net movement, molecules still move after equilibrium, just no net movement, g=-s. Ex: people in elevator (more s when less people)]
