Chapter 3: Cell Metabolism

Animations

The following animations are available for this chapter:

3.1 Catalysts and Activation Energy In a chemical reaction, an enzyme lowers the amount of energy required to reach the transition state, allowing the reaction to proceed at an accelerated rate.
3.2 Enzyme-Catalyzed Reactions In this example, an enzyme provides a template upon which two substrates are brought together in the proper position and orientation to react with each other.
3.3 Glycolysis Glycolysis is the initial stage in the breakdown of glucose, resulting in two molecules of pyruvate and a net gain of two molecules of ATP.
3.4 The Citric Acid Cycle The citric acid cycle is the central pathway in oxidative metabolism and completes the oxidation of glucose to six molecules of carbon dioxide.
3.5 The Calvin Cycle In the Calvin cycle of photosynthesis, six molecules of carbon dioxide are used to generate a molecule of glucose.

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