BIOSC-101 Lecture Notes - Lecture 4: Radiant Energy, Chemical Kinetics, Kinetic Energy
26 Aug 2020
School
Department
Course
Professor
Document Summary
Large macromolecules can have multiple ligand binding sites. Binding reactions can be independent or alter the binding affinity of another molecule at a distant site. Dissociation of water molecules breaks one of the o-h bonds. Ph: negative log of the hydrogen ion concentration in solution. Acid: any molecule that tends to release a hydrogen ion (h+) Base: any molecule that readily combines with a hydrogen ion. Buffers: weak bases and acids that bind to excess h+ or oh- to maintain a constant ph in the cytoplasm. The buffering capacity depends on the concentration of the buffer and the relationship between its pka value and the ph. Titration: slow addition of one solution (with known concentration) to another solution (with known volume) to determine its concentration. Acid-base titrations are monitored by the change of ph. Principal forms of energy: kinetic or potential. Thermal energy: energy of the motion of molecules. Mechanical energy: energy of movement within cells.
