Questions and Answers
Where in the cell does cellular respiration take place?
mitochondria
Write the overall chemical equation for cellular respiration. Label the reactants and products. What is the energy source for cellular respiration?
C6H12O6 + O2 ------> CO2 + H2O + ATP. The reactants are oxygen and glucose. The products are ATP, CO2, and water. The energy source is glucose molecules.
Why is it important to convert the energy in glucose into ATP molecules? Why do we need ATP?
It is important to convert the energy in glucose into ATP molecules because energy is needed to survive. We need ATP because it is the high-energy molecule that stores the energy we need to do just about everything we do.
Compare the amount of energy in the cellular respiration products compared to the cellular respiration reactants.
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Explain how photosynthesis and cellular respiration are related.
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Photosynthesis is ENDOTHERMIC, meaning that it requires input of / to occur. Whereas cellular respiration is EXOTHERMIC, meaning the _____ of energy occurs.
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In photosynthesis, what energy is going in? How is that energy utilized?
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In cellular respiration, what energy is coming out? How is that energy utilized?
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What is an autotroph? Give an example.
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What is a heterotroph? Give an example.
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Explain how carbon is cycled through the biosphere in relation to cellular respiration.
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Explain how carbon is cycled through the biosphere in relation to photosynthesis.
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Explain how carbon is cycled through the biosphere concerning decomposers.
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Explain how carbon is cycled through the biosphere concerning fossil fuels.
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Explain how carbon is cycled through the biosphere concerning fuel oxidation.
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Explain how methane leakage affects CO2 levels.
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Study Notes
Cellular Respiration Overview
- Cellular respiration occurs in the mitochondria of cells.
- Overall chemical equation: C6H12O6 + O2 → CO2 + H2O + ATP
- Reactants: glucose and oxygen; Products: carbon dioxide, water, and ATP.
Importance of ATP
- ATP is crucial as it is the main energy carrier used by cells for various functions.
- Converting glucose to ATP allows organisms to harness energy necessary for survival.
Energy Dynamics
- Energy in products equals the energy in reactants, aligning with the Law of Conservation of Matter.
- Energy is released during ATP production but not destroyed, demonstrating energy transformation.
Photosynthesis and Cellular Respiration Integration
- Photosynthesis absorbs sunlight, CO2, and water to produce sugars and oxygen.
- Cellular respiration uses those sugars and oxygen, producing ATP, CO2, and water, thus completing a matter cycling process in ecosystems.
Energy in Photosynthesis and Cellular Respiration
- Photosynthesis is endothermic, requiring energy/heat input; cellular respiration is exothermic, resulting in an output of energy.
- Energy from sunlight is used in photosynthesis to synthesize glucose from CO2 and water.
Autotrophs and Heterotrophs
- Autotrophs, like plants, produce their own food through processes like photosynthesis.
- Heterotrophs, such as humans and animals, consume organic substances for energy.
Carbon Cycling in the Biosphere
- Cellular respiration releases carbon dioxide back into the atmosphere.
- Photosynthesis uses atmospheric CO2 to synthesize oxygen and glucose.
- Decomposers break down organic matter, releasing CO2 as they respire.
- Fossilization processes convert decomposed organic material into fossil fuels (oil, coal, gas) over millions of years, which also contribute to CO2 emissions when burned.
- Combustion of fossil fuels releases carbon dioxide into the atmosphere, impacting environmental carbon levels.
- Methane emissions can elevate CO2 levels, illustrating the interconnectedness of biological and geological processes in carbon cycling.
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Test your knowledge on cellular respiration with these flashcards covering key concepts and definitions. From the location of cellular respiration to its chemical equations, this quiz helps reinforce understanding of the cellular process that generates energy. Perfect for students studying biology or related subjects.