Cellular Respiration

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Submitted By miccus7673
Words 2533
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Chapter 9
Cellular Respiration
— Objectives
— Equation for Cellular Respiration
— Electron Carriers and Redox Reactions
— Process of Cell Respiration
— Glycolysis
— Prep Reaction
— Krebs Cycle (Citric Acid Cycle)
— Electron Transport Chain
— Fermentation
— The Ingredients
— You already know what is needed for Cellular Respiration
Food + Oxygen Carbon Dioxide+ Water +ENERGY!
C6H12O6 + O2 CO2 +H2O + ATP
— Redox Reactions (the shuffling of electrons)
• Most of the reactions involved in the process are possible because of the redox reaction of NAD, an electron carrier
• Oxidation – a reaction in which a substance loses electrons
C6H1206 CO2
• Reduction – a reaction in which a substance gains electrons
O2 H2O
• Oxidation always occurs with reduction = Redox Reaction
— NAD: An Electron Carrier
— NAD+ gains an electron to become NAD
— NAD gains a hydrogen to become NADH
— This can also occur with the electron carrier FAD
— Cellular Respiration
— The means in which the cell produces energy
— Often consists of 4 Steps:
— Glycolysis
— Prep Reaction
— Krebs Cycle (Citric Acid Cycle)
— Electron Transport Chain
— Glycolysis
• Occurs in the cytosol
• Begins with a molecule of glucose (a 6 carbon sugar)
• Uses the energy of 2 ATP to split the stable glucose into 2 unstable molecules each containing 3 carbons
• Now all processes occur twice
• Phosphates are added and removed to produce 2 molecules of pyruvic acid
— The Prep Reaction
— Occurs inside the mitochondria
— Pyruvic acid reacts with coenzyme A to form acetyl coA and CO2
— NADH is also formed
— Krebs Cycle
• Occurs in the outer compartment of the mitochondria
• Also known as the Citric Acid Cycle
• Acetyl coA reacts with oxaloacetic acid to form…...

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