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10 Cards in this Set
- Front
- Back
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Provide the overall chemical equation for cellular respiration |
glucose+O2➡️CO2+H2O+ATP |
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How is energy in a glucose molecule released during cellular respiration |
•by simply burning it ~it’ll lose its hydrogen atoms and become oxidized to CO2 |
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How are redox reactions used in cellular respiration ? |
A chemical rxn in which one molecule loses electrons while another molecules gains electrons |
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Role of nicotinamide adenine dinucleotide in cellular respiration |
Important coenzyme in oxidizing glucose *becomes reduced to NADH |
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Role of pyruvate in cellular respiration |
The pyruvate formed in glycosis is transported from the cytoplasm into a mitochondrion where the citric acid cycle and oxidative phosphorylation will occur |
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Role of flavin adenine dinucleotide in cellular respiration (FAD) |
can temporarily store energy during cellular respiration via a reduction reaction. When FAD reacts with two hydrogen atoms, it can form FADH2. |
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Roles of the electron transport chain in cellular respiration |
Creates a staircase for electrons to travel as a result of the redox reactions |
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Compare the reactants, products, and energy yield of the stages of the cellular respiration |
1. glycolysis - net 2 ATP, 2 NADH, 2 pyruvate 2. citric acid cycle - (reactants) 2 acetyl CoA (products) 2 ATP, 6 NADH, 2 FADH and 2 CO2 released 3. oxidative phosphorylation - (reactants) NADH and FADH, (products) water, 32 ATP |
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Identify the total possible yield of ATP molecules per glucose. Explain why the number of ATP molecules cannot be stated exactly. |
The total yield of ATP molecules per glucose is about 32 (2 from glycolysis, 2 from citric acid cycle, and 28 from oxidative phosphorylation). This number can not be found precisely since NADH from glycolysis passes its electrons to either NAD+ or FAD and FADH2 adds its electrons farther on in the ETC, so it gives less off to the H+ gradient, and thus produces less ATP. Furthermore, some of the energy from the H+ gradient may be used in places other than ATP production, like the active transport of pyruvate into the mitochondria. Lastly, some cells have different numbers of oxygen available, so the ATP from oxidative phosphorylation can change. |
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Compare reactants, products, and energy yield of alcohol fermentation |
ALCOHOL (reactants) glucose 2 NADH (products) 2CO2 and ethanol and NAD+ recycles and 2 ATP released LACTIC (reactants) glucose 2 NADH (products) 2 ATP 2 lactate |
