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Bio260 – Spring 2014 North Seattle College Colleen Sheridan In-class activity on metabolism, Part I Amount of energy. Which of the following processes harvests more energy? Less energy? Rank them. o Aerobic respiration o Anaerobic respiration o Fermentation Back up your answer by including the following key terms: (see Figure 6.7 for help) • Chemical energy source (use glucose as an example) • Terminal electron acceptor (use the appropriate acceptor for each process) • Electrons • Electron affinities • What gets oxidized • What gets reduced • Oxidation-reduction reaction (redox reaction) • Energy released Why don’t we (and our bacteria) burst into flames when we (they) break down glucose for energy? o What are the different metabolic pathways that cells use to harvest energy? How do enzymes work? o In your answer use the following key terms: Substrate(s) Active site Activation energy Catalyze (what does it mean “to catalyze” a chemical reaction?) Product(s) o In the picture below, explain why the graph of an enzyme rate of reaction goes down to the left of its optimal temperature goes down to the right of its optimal temperature