2. A. Letter B represents the energy difference between the reactants and products for the uncatalyzed pathway. B. Letter B represents the energy difference between the reactants and products for the catalyzed pathway. C. Letter B represents the activation energy of the uncatalyzed reaction pathway. D. Letter B represents the activation energy of the catalyzed reaction pathway. 3. Pancreatic amylase is a digestive enzyme found in the small intestine. It helps break down large starch molecules later in the digestive process. Pancreatic amylase is unable to break down lipid A. Lipids are too hydrophobic to be broken down by enzymes. B. Lipids are too small to bind to enzymes. C. Enzymes bind only to their specific substrates. D. Enzymes denature in the presence of lipids. 4. Phosphoglucomutase which catalyses the formation of glucose-6 -phosphate from glucose-1- phosphate,is best classified as which of the following enzyme type? A. Oxidoreductase B. Isomerase C. Kinase D. Lyase 5. The active site of an enzyme E which catalyzes a reaction X, is partially denatured:which following quantities associated with X is most likely to be affected by the partial denaturati E compared to the native form of E? A. the rate-constant k B. the boltzmann constant k_(b) C. the heat of reaction Delta H D. the equilibrium constant k_(eq) 6. Which of the following molecules cannot be classified as an enzymatic cofactor? A. Valine B. FAD (Flavine adenine Dinucleotide) C. Mg2+ D. Heme