BIO206H5 Chapter Notes - Chapter 2: Phospholipid, Bond Length, Organic Compound
Document Summary
C,h,n,o : make up 96. 5% of an organism"s weight. Outer most electrons determine how atoms interact. In living tissues, only e of an atom undergoes rearrangements. Atoms with more than 4 shells are rare in biological molecules. Ionic: electrons are transferred from 1 atom to another: type of electrostatic attraction- force of attraction between 2 oppositely charged ions. Bond strength is the amount of energy required to break a bond. Making and breaking covalent bonds in living cells are controlled by enzymes. There are different types of covalent bonds. Double bond is shorter and more stronger than single. Polar structure: one with positive charge concentrated on one end and negative. Intermediate bonds between double and single. i. e benzene charge concentrated on the other end. Electrostatic attractions help bring molecules together in cell. Covalent bonds are very strong in aqueous solution. Strong: when atoms involved are fully charged i. e nacl.
