Cellular Respiration – Chapter 7
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How do organisms use energy?
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work in cells uses ATP
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ATP has to be replaced
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Glucose, glycogen etc. broken down to make more ATP
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Requires many steps but occurs quickly
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Cellular Respiration
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The metabolic pathway where cells harvest energy from metabolism of
food molecules
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Glucose is one of the main food molecules used
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Grouped into three different stages:
1.
Glycolisis
2.
Krebs Cycle
3.
Electron Transport system
Cellular Respiration – overview
1. Glycolysis
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The most widespread metabolic pathway
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Primitive & present in every cell type
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Glucose split into two 3-carbon compounds
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Hydrogens stripped from carbons
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Energy of broken bonds harvested & net production of 2 ATP
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Occurs in cytoplasm of cell (not mitochondria)
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Requires no organelles
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Requires no oxygen (the anaerobic metabolic pathway)
2. Krebs Cycle
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- Fall '08
- wetherbee
- Biology, Cellular Respiration, Glucose, Glycolysis, Adenosine triphosphate
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