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Ch9Themes - down For example the enzyme hexokinase binds to...

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By Nolan Mattox and Lennart Bastian Examples of the major themes of AP Biology in Chapter 9 Energy Transfer: In Cellular Respiration, energy from carbohydrates is broken down into CO2 (Carbon Dioxide) and H2O (Water). In this process, cells extract energy stored in food and transfer that energy to molecules of ATP. Relationship of Structure and Function: Glycolysis is a multi-step anaerobic process that breaks down one glucose molecule and releases four ATP molecules. Each step of glycolysis is catalyzed by an enzyme specific to the step. The enzyme structure fits perfectly to the specific molecule causing it to break
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Unformatted text preview: down. For example, the enzyme hexokinase binds to the molecular structure of glucose, breaking it down in the first step of glycolysis. Regulation: Phosphofructokinase is an allosteric enzyme that catalyzes step 3 of glycolysis. It is inhibited by ATP. The way it’s inhibited is an example of negative feedback. When plenty of ATP is available in the cell to meet demand, respiration slows down, conserving valuable molecules and energy for other functions. This negative feedback system is an example of regulation....
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