Unit 2 Test Guide
Unit 2 test will be based on knowledge and understanding of materials presented in chapters 2,
3, 4, & 5 in addition to other topics, demonstrations and labs that were presented or discussed
in this unit. Questions will test both your knowledge and comprehension of the materials in
addition to analyzing and applying this knowledge. Expect about 40 multiple choice questions
and 2 or 3 free response questions.
Chapter 2:
Elements, compounds, isotopes, molar mass.
Bonding: covalent, ionic, H-bonds, cd Waals, chemical reactions and conservation of matter.
Molecules have shapes.
Chapter 3:
Water polarity, role of covalent and hydrogen bonds in properties of water (cohesion,
adhesion, density of ice, moderation of temperature, specific heat, evaporative cooling, role as
a solvent)
pH scale, acids and bases, fate of CO2 in oceans.
Chapter 4:
Carbon bonding and compounds, carbon skeletons, isomers, key functional groups (hydroxyl,
carbonyl, carboxyl, amino, sulfhydryl, phosphate, methyl).
Chapter 5:
Monomers and polymers of large biological molecules, carbohydrates as fuel and structural
molecules.
Lipids as group of hydrophobic molecules, role fats, phospholipids and steroids.
Amino acids (basic structure and R-groups, non-polar, polar and electrically charged groups),
peptide bonds, proteins (primary, secondary, tertiary and quaternary structure, roles played as
enzymes, structural proteins).
Nucleic acids (role in information storage and expression, building blocks of nucleic acids, DNA
complementary chain directions, RNA compared to DNA.
(updated October 2013)