the process that releases energy from food in the presence of oxygen
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Cellular Respiration Equation
C6H12O6 + 6O2 --> 6CO2 + 6H2O + ATP
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Cellular Respiration Reactants and Products
Glucose + Oxygen → Carbon Dioxide + Water + Atp
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what does aerobic mean?
with oxygen
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what does anaerobic mean?
without oxygen
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what are the 3 phases of cellular respiration?
1. glycolysis 2. krebs cycle 3. electron transport chain
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which phase(s) of CR do not need oxygen?
glycolysis
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which phase(s) of CR DO need oxygen?
krebs cycle, electron transport chain
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what is glycolysis? where does it occur?
process that breaks down glucose, cytoplasm
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what is the first step of glycolysis?
2 ATP's transfer their phosphate groups to a glucose
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what is the second step of glycolysis?
2 phosphates r taken from 3C's, phosphate added to ADP, electrons and H+ are removed from 3C, NAD+ is converted to NADH
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what is the third step of glycolysis?
3C's are converted to 2 molecules of pyruvate
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what is the krebs cycle? where does it occur?
series of reactions in which pyruvate is broken down into CO2, occurs in the mitochondrial matrix
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Glycolysis Products
2 ATP, 2 NADH, and 2 pyruvic acids
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Alternative name for Kreb cycle
Citric acid cycle because citric acid is the first compound formed in this series of reactions
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First Step of Krebs Cyle
NAD+ accepts 2 high-energy electrons to form NADH. One CO2 molecule is produced. 2 carbons from pyruvic acid form to make acetyl-CoA
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Second Step Kreb Cycle
Acetyl-CoA combines with a 4-carbon molecule to produce citric acid
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Third Step of Kreb Cyle
CO2 is released from a 5 carbon to make a 4 carbon
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Fourth step of the krebs cycle
4 carbon molecule starts cyle again by combing with acetyl-CoA. Generates FADH2 and NADH and ATP
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Products of Krebs Cycle
carbon dioxide, NADH, FADH2, and ATP
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How many times does Kreb Cyle need to happen before the glucose is broken down completely?
Twice
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What does the electron transport chain do? Where does it occur?
uses the high-energy electrons from glycolysis and the Krebs cycle to convert ADP into ATP. Occurs in the inner mitochondrial membrane.
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First step Electron transport chain
NADH and FADH2 pass their high-energy electrons to electron carrier proteins in the electron transport chain
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Second step electron transport chain
passes energized e- from protein to protein, e- loses some energy
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3rd step electron transport chain
H+ ions pass back across the mitochondrial membrane through the ATP synthase, causing the ATP synthase molecule to spin. With each rotation, the ATP synthase attaches a phosphate to ADP to produce ATP.
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4th Step of Electron Transport Chain
Hydrogen Ion, electrons, and oxygen molecule bond to form H20
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ETC Products
H20, and ATP
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how much ATP does each phase of the calvin cycle make?
glycolysis = 2 ATP \n krebs cycle = 2 ATP \n ETC = 34-36 ATP