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| Living cells require energy from ______ sources. |
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| Energy flows into an ecosystem as _____ and leaves as _____. |
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| in as sunlight & leaves as heat. |
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| Photosynthesis generations ___ and ___ molecules, which are used in cellular respiration. |
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| Cells use chemical energy stored in organic molecules to regenerate ____, which powers work. |
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| _____ pathways yield energy by oxidizing organic fuels. |
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| the breakdown of organic molecules is ____ |
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_____ a partial degradation of sugars that occurs without O2
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| ____ ____ consumes organic molecules and O2 and yields ____. |
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| _____ ______ consumes compounds other than O2. |
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| The _____ of _____ during chemical reactions releases energy stored in organic molecules. |
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| The energy released from the transfer of electrons will ultimately be used to synthesize ____. |
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| chemical reactions that transfer electrons between reactants |
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| Redox Reactions (oxidation-reduction rxns). |
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| a substance losing electrons = |
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| a substance gains electrons |
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| some redox rxns don't transfer e- but change the electron sharing in covalent bonds. An example.. |
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| an example of this would be the reaction between methane and O2. |
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| Electrons from organic compounds are usually first transferred to _____, a coenzyme. |
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| NAD+ functions as an ____ ____ during cellular respiration. |
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| Each NADH represents ____ ____ that is tapped to synthesize ATP. |
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| NADH passes the electrons to the ____ ____ ____. |
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| Electron transport chain. |
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| Cellular respiration has 3 stages: |
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Definition
- Glycolysis
- Citric acid cycle
- Oxidative Phosphorylation
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| ______ breaks down glucose into two molecules of pyruvate. |
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| The ___ ___ ___ completes the breakdown of glucose. |
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| ______ ______ accounts for most of the ATP synthesis |
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Definition
| Oxidative phosphorylation |
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| What process generates most of the ATP and why? |
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Definition
| Oxidative phosphorylation because it is powered by redox reactions. |
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