The document provides answers to two biology questions. It explains that hydrocarbons are hydrophobic because they contain nonpolar carbon-hydrogen bonds. It then lists the four major classes of macromolecules as carbohydrates, lipids, proteins, and nucleic acids and identifies the monomer building block for each class.

1. Bio Opener September, 27 2012
 Explain
the basic structure of a
hydrocarbon & tell why they are
hydrophobic.
 List
the 4 major classes of macromolecules
& tell the building block monomer for
each.

2. Answer
 Bondsare nonpolar carbon to hydrogen
linkages.
 Carbohydrates – monosaccharides
 Lipids – glycerol and fatty acid
 Protein – amino acids
 Nucleic acids - nucleotides