Bio1151 Chapter 4 Carbon and the Molecular Diversity of Life
  1. Living organisms are made up of          compounds based mostly on the element carbon, which has       valence electrons, and can form four covalent bonds with other atoms.

  2. Fats contain              tails composed of only         and           atoms.

  3. Some organic compounds occur as          with the same molecular formula but different             .

  4.             groups are the chemically reactive groups of atoms that give          molecules distinctive chemical properties.