Lecture 13 220 BlkBd

Lecture 13 220 BlkBd - Metabolism is organized into...

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Metabolism is organized into pathways Metabolism is organized into sequences of enzyme- catalyzed chemical reactions called pathways. A simple diagram of a biochemical pathway is as follows: A B C D Each step A to B to C to D occurs appropriately because of enzymes. For example, one enzyme converts A to B; a second enzyme converts B to C. Some metabolic pathways are anabolic and synthesize the building blocks of macromolecules. Some are catabolic and break down macromolecules and fuel molecules. enzyme 1 enzyme 2 enzyme 3
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Figure 8.12 The ATP cycle
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Figure 8.11 How ATP drives cellular transport and mechanical processes
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Figure 9.2 Energy flow and chemical recycling in ecosystems
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Glucose + oxygen carbon dioxide and water + energy C 6 H 12 O 6 + 6 O 2 6 CO 2 + 6 H 2 O + energy ∆G = 686kcal of energy per mol of glucose (180g). The energy required to move the reaction in the opposite direction (ie. synthesize the glucose) comes from sunlight ( photosynthesis ). Glucose Anabolism
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Figure 9.2 Energy flow and chemical recycling in ecosystems
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Glucose + oxygen carbon dioxide and water + energy C 6 H 12 O 6 + 6 O 2 6 CO 2 + 6 H 2 O + energy ∆G = -686kcal of energy per mol of glucose (180g). Glucose is transformed from a less stable and more complex state (low entropy) to a more stable and less complex state (higher entropy). ie. CO 2 and water. This reaction is broken down into a many different steps that occur in
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Lecture 13 220 BlkBd - Metabolism is organized into...

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