1. Draw the reaction of peptide formation and list THREE characterizes of peptide bond. (10%)

4. Although epinephrine and glucagon both exert glycogenolytic effects, they do so for quite different reasons in physiology. Please describe the difference between epinephrine and glucagon. In addition, please compare the effect between epinephrine and glucagon in liver and muscle. State your discussion in glycolysis, gluconeogenesis, glycogen break down and glycogen synthesis. (10%)