welcome to class! 11-16 and 11-17 complete the following: warm up staar review sesssion 1...
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Learning Objectives Describe what happens during glycolysis. Describe what happens during the Krebs cycle. Explain how the electron transport chain uses high-energy electrons. Identify how much ATP cellular respiration generates.TRANSCRIPT
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Welcome to Class! 11-16 and 11-17
Complete the following: Warm up STAAR REVIEW Sesssion 1 Biochemistry and Cells
(complete #1-5 questions) Cornell Notes due Quiz over Photosynthesis Notes on Cellular Respiration Concept Map Homefun: None (but if not finish with concept map then that’s homefun)
Science Fair anyone? Paper File is due Tuesday 11/16/15 Count as extra credits. Science Fair presentation is December 4-5 at Judson High School.
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The Process of Cellular Respiration
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Learning Objectives Describe what happens during glycolysis. Describe what happens during the Krebs cycle. Explain how the electron transport chain uses high-energy
electrons. Identify how much ATP cellular respiration generates.
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Cellular RespirationCellular respiration is a process of energy conversion that releases energy from food in the presence of oxygen.
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Cellular Respiration
The chemical summary of cellular respiration is:
What does the equation look like expressed in symbols?
Oxygen + Glucose Carbon Dioxide + Water + Energy
2 6 12 6 2 26O + C H O 6CO + 6H O + Energy
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Stages of Cellular Respiration• Glycolysis
• Krebs cycle
• Electron transport
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Stage 1: GlycolysisGlucose first enters a chemical pathway known as glycolysis. A small amount of energy is captured to produce ATP.
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Stage 2: Krebs CycleIn the second stage of cellular respiration a little more energy is converted.
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Stage 3: Electron TransportThe final stage requires reactants from the other two stages of the process.
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Photosynthesis and Cellular RespirationPhotosynthesis and cellular respiration can be thought of as opposite processes.
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GlycolysisOne molecule of glucose is converted to two molecules of pyruvic acid.
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Glycolysis: ATP and NADH ProductionATP and NADH are produced during glycolysis.
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The Krebs CyclePyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions.
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The Krebs CyclePyruvic acid from glycolysis is used to make NADH, ATP, and FADH2, with carbon dioxide as a by-product.
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The Krebs CyclePyruvic acid passes through the two membranes of the mitochondrion and into the matrix.
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The Krebs Cycle: Citric Acid ProductionAcetyl-CoA adds the 2-carbon acetyl group to a 4-carbon molecule already present, producing a 6-carbon molecule called citric acid.
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The Krebs Cycle: Energy Extraction
Citric acid is broken down into a 4-carbon molecule, more carbon dioxide is released, and electrons are transferred to energy carriers.
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The Krebs Cycle: Energy ExtractionFor each turn of the cycle, a molecule of ADP is converted to a molecule of ATP.
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The Krebs Cycle: Energy ExtractionAt five places in the cycle, electron carriers accept a pair of high-energy electrons, and NAD+ and FAD are converted to NADH and FADH2.
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Electron TransportProducts from the Krebs cycle and glycolysis feed into the last step of cellular respiration.
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Electron TransportElectron transport uses the high-energy electrons from glycolysis and the Krebs cycle to synthesize ATP from ADP.
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Electron TransportElectron transport chain is composed of a series of electron carriers located in the inner membrane of the mitochondrion.
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Electron Transport: ATP Production
The cell uses a process known as chemiosmosis to produce ATP.
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Total ATP from Cellular RespirationGlycolysis, the Krebs cycle, and the electron transport chain release about 36 molecules of ATP per molecule of glucose.
2
2
32
CO2
Total ATP?
30 to 42