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Catabolic pathways

Ch 9- exam 3- catabolic pathways yield energy by oxidizing organic fields

QuestionAnswer
How does energy flow through ecosystems? energy flows in as SUNLIGHT, photosynthesis, cellular respiration, and energy leaves as HEAT
Where does energy flow come in from sunlight
How does energy flow change? Photosynthesis: light and carbon dioxide (CO2) convert into oxygen (O2) and organic molecules
What processes drive these changes? Cellular respiration: oxygen (O2) and organic molecules are used to generate ATP
How is energy ultimately released? heat
is energy flow within an ecosystem linear or cyclical Linear, moving from the sun to producers to consumers, with energy lost as heat at each stage
What does linear mean? process or pathways that move in one direction, without repeating or cycling back
What does cyclical mean? describes processes that repeat in a cycle
What are catabolic pathways in terms of energy? releases energy
What are catabolic pathways in terms of what happens to molecules? breakdown larger molecules into smaller molecules
What is cellular respiration? Carbohydrates, fats, and proteins are all consumed as fuel
What is fermentation? cells convert sugars into acids, gases, or alcohol in the absence of oxygen
What is two main differences between fermentation and cellular respiration? fermentation does not need oxygen while cellular respiration requires oxygen, fermentation produces less energy (ATP) per glucose molecule while cellular respiration produces more energy (ATP) per glucose molecule
What is the summary equation for cellular respiration? C6H12O6 + 6O2 ---> 6 CO2 + 6 H2O + Energy (ATP + Heat)
What are anabolic pathways in terms of what happens to molecules? reactions that assemble small molecules into marcromolecules and biomass
What are anabolic pathways in terms of energy? Uses energy
What are the stages of chemical complexity? 1. digestion of macromolecules, 2. monomers are converted to a small number of common intermediates, 3. (optional) intermediates are broken down into CO2
Created by: josie_d
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