7.1: Catabolic Pathways Yield Energy by Oxidizing Organic Fuels
Key Terms: Fermentation, Aerobic Respiration, Anaerobic Respiration, Cellular Respiration, Redox Reactions, Oxidation, Reduction, Reducing Agent, Oxidizing Agent, NAD⁺, Electron Transport Chain,
BELLWORK: Watch and take your own notes on 1.) the The Importance of Oxygen Bozeman Video AND 2.) the first 3 minutes of Redox Reactions
IN CLASS READING of Concept 7.1: Pages 141-145 in your text.
From page 141:
1. Draw a diagram that shows energy flow and chemical recycling in ecosystems.
2. Explain how energy flows through ecosystems, while chemicals are recycled.
3. Describe how photosynthesis and cellular respiration can be seen as opposites.
From page 142:
4. Describe what a catabolic pathway is.
5. Explain why organic compounds possess potential energy.
6. List 2 fates of the energy taken out of chemical storage.
7. State the most efficient catabolic pathway for your cells.
8. Explain how anaerobic respiration is different than aerobic respiration.
9. List 3 types of biomolecules that can be processed and consumed as fuel.
10. Write down the chemical equation for cellular respiration. Include ΔG!
11. Explain what it means when ΔG is negative.
12. Explain what a cell must do to keep working.
13. Use a Venn Diagram to compare and contrast oxidation with reduction.
From page 143:
14. Explain why oxygen is one of the most powerful of all oxidizing agents.
15. Summarize how a redox reaction (like the burning of methane) releases chemical energy that can be put to work.
16. State what the common "fuel" is for cellular respiration.
17. Explain why organic molecules that have an abundance of hydrogen are excellent fuels.
18. Explain what prevents the spontaneous combustion of glucose under normal conditions.
19. Explain how a cell slows the process of breaking down glucose.
20. Describe what gets stripped from glucose during this process.
21. Summarize the role of NAD⁺during respiration.
From page 144:
22. Explain how NAD⁺ becomes reduced to become NADH.
23. Describe what each NADH molecule formed during respiration represents.
24. List 2 ways that cellular respiration differs from the explosive combustion of liquid H₂ and O₂ seen in rocket engines.
From page 145:
25. Describe the electron transport chain. Include where in the eukaryotic cell it happens, and where in a prokaryotic cell it happens.
26. Create an analogy for oxygen "pulling" electrons down the chain.
27. Sequence the "downhill" route that most electrons travel during cellular respiration.
1. Draw a diagram that shows energy flow and chemical recycling in ecosystems.
2. Explain how energy flows through ecosystems, while chemicals are recycled.
3. Describe how photosynthesis and cellular respiration can be seen as opposites.
From page 142:
4. Describe what a catabolic pathway is.
5. Explain why organic compounds possess potential energy.
6. List 2 fates of the energy taken out of chemical storage.
7. State the most efficient catabolic pathway for your cells.
8. Explain how anaerobic respiration is different than aerobic respiration.
9. List 3 types of biomolecules that can be processed and consumed as fuel.
10. Write down the chemical equation for cellular respiration. Include ΔG!
11. Explain what it means when ΔG is negative.
12. Explain what a cell must do to keep working.
13. Use a Venn Diagram to compare and contrast oxidation with reduction.
From page 143:
14. Explain why oxygen is one of the most powerful of all oxidizing agents.
15. Summarize how a redox reaction (like the burning of methane) releases chemical energy that can be put to work.
16. State what the common "fuel" is for cellular respiration.
17. Explain why organic molecules that have an abundance of hydrogen are excellent fuels.
18. Explain what prevents the spontaneous combustion of glucose under normal conditions.
19. Explain how a cell slows the process of breaking down glucose.
20. Describe what gets stripped from glucose during this process.
21. Summarize the role of NAD⁺during respiration.
From page 144:
22. Explain how NAD⁺ becomes reduced to become NADH.
23. Describe what each NADH molecule formed during respiration represents.
24. List 2 ways that cellular respiration differs from the explosive combustion of liquid H₂ and O₂ seen in rocket engines.
From page 145:
25. Describe the electron transport chain. Include where in the eukaryotic cell it happens, and where in a prokaryotic cell it happens.
26. Create an analogy for oxygen "pulling" electrons down the chain.
27. Sequence the "downhill" route that most electrons travel during cellular respiration.
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