BIO152H5 Lecture Notes - Lecture 2: Cell Nucleus, Nucleoside, Thymine
Document Summary
Water molecule that support all life life began in water. All life remains tied to water important in chem reactions cells = 70-90% water. Water lattice = arrangement of hydrogen bonding. In liquid state the hb (hydrogen bonds) that hold the lattice together constantly break and reform. The molecules to slip past each other and reform the lattice in new positions; this gives water its fluid properties. In solid state (ice) the water lattice has a rigid crystal-like structure. The ice lattice spaces the hydrogen bonds further apart compared to the liquid state; this why ice is more dense then liquid water. Specific heat; the amount of thermal energy required to raise temp of a given quantity of a substance by one degree. Water has a high heat capacity as a result of the stable hydrogen lattice. It takes a great deal of energy to break the hydrogen bonds due to the fact much of the energy gets absorbed.
