BIOL 2020 Chapter Notes - Chapter 2: Van Der Waals Force, Weak Interaction, Phospholipid
Document Summary
Water, weak bonds, and the generation of order out of chaos. Transient chemical interactions form the basis of biochemistry and life itself. Brownian motion: movement of particles due to random fluctuation of the energy content of the environment, thermal noise. 2. 2 biochemical interactions take place in an aqueous solution. Hydrogen bonds are the most common in biomolecules. Noncovalent: ionic bonds, hydrogen bonds, van der waals interactions. Electrostatic interactions/ionic bonds/salt bridges: interactions between distinct electrical charges on atoms. Distance for maximal bond strength is: 3 angstroms. Hydrogen bonds: longer than covalent bonds, can be disrupted by water, therefore strongest in the absence of water. Van der waals: distribution of electronic charge around an stom changes with time, not perfectly symmetrical, forces act until 2 atoms are at the distance of contact distance . Cluster together to increase the entropy in water. Ring of phospholipids in water: van der waals forces between tails.
