Do Now Begin working on the review outline

Do Now Begin working on the review outline you received in class yesterday, if you are not yet finished

Tomorrow’s Test � Tomorrow’s Test is on Unit 2, The Chemistry of Life � Major Topics include: ◦ ◦ Matter and bonds Water and solutions Macromolecules Enzymes

Matter & Molecules � Be sure you are able to define and identify examples of: ◦ ◦ ◦ Matter Elements Compounds Atoms Molecules � Make sure you know the basic parts of an atom ◦ Nucleus �Protons �Neutrons ◦ Electrons

Water � You should be able to identify and explain the following special characteristics of water: ◦ ◦ High surface tension High melting and boiling points Density anomaly Solvent properties � Also, be able to define polarity and explain how it gives water its special properties and the ability to make hydrogen bonds

Solutions & p. H � Define ◦ ◦ ◦ & identify: Solution, solute, & solvent p. H scale (acids <7, bases >7) Hydronium (H 3 O+, more in acids) Hydroxide (-OH, more in bases) Concentration Aqueous vs. non-aqueous

Macromolecules Class / Type Carbohydrates Proteins Nucleic Acids Building blocks Monosaccharides Amino acids Nucleotides Smaller lipids Building block characteristics 20 types, make 2 bonds Phosphate, sugar, base Speed up reactions (enzymes) Store Cell information membrane component, long-term energy 5 -6 atom ring, 1: 2: 1 ratio C: H: O Major functions Store energy Important types Mono-, di-, and Enzymes, polysaccharides, esp. cellulose pectinase (plant cell walls) DNA, RNA Lipids Hydrophobic Phospholipid s (cell membrane lipids)

Enzymes � Be sure you know what enzymes are ◦ Proteins made of amino acids � What they do � How they do it ◦ Speed up chemical reactions of substrates ◦ Lower activation energy