AP Biology Exam Study Guide and Tips Questions and Answers

AP Biology Exam Study Guide and Tips Questions and Answers Organic Compounds are molecules that contain carbon. Hydrolysis Reaction is a compound that dissolves in water and is the decomposition of something in the presence of water. Dehydration Reaction releases water. Oxidation-Reduction Reactions involve the gain (oxidation) or loss (reduction) of electrons. Anabolic Reactions create larger molecules from smaller ones. Catabolic Reaction breaks down larger molecules. Exergonic Reaction releases energy. Endergonic Reaction requires energy. What properties make water essential to life on earth? The water molecule's polar nature leads to surface tension (enabling capillary action) and makes it an effective solvent. It expands rather than contracting when it freezes. Enzymes are proteins that facilitate reactions by binding to the substrate and reducing the activation energy. All living matter is made up of what? Nitrogen,carbon,hydrogen,oxygen,phosphorus, and sulphur. Carbon is the main element of life because of the variety of organic compounds it can form. Hydrophilic (water loving) are compounds that easily dissolve in and mix with water.