This activity is designed to help students determine whether a chemical reaction is spontaneous or nonspontaneous and know whether or not an enzyme is required for a reaction to occur, using a variety of examples. The activity is broken into three primary components. The first is a mini-lecture and demonstration on enzyme activity and activation energy. In the second component, students predict results of an experiment on the browning of a fruit slurry and interpret data from that experiment. The final component includes information and questions for student group discussion on the processes that result in fruit ripening and the spontaneity of the biochemical pathways that result in this common observation. Clicker questions are included throughout the activity to support learning and encourage peer discussion of the material. The activity is designed to work for any class size, and is most applicable to a majors-level course (1113). However, components could easily be modified to work for a non-majors course.
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