Cellular Respiration. What is Cellular Respiration? When organisms capture the _______ stored in the chemical bonds of food molecules such as glucose.

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Cellular RespirationWhat is Cellular Respiration?When organisms capture the _______ stored in the chemical bonds of food molecules such as glucose and other sugars made in photosynthesis.Cellular respiration builds a molecule calledATP, which powers all work within cells.energy Sucrose: A disaccharideGlucoseFructoseMonosaccharidesATP2Why ATP?Why do we transfer the energy in the chemical bonds of glucose into ATP?ATP is smallATP is stable but not too stableThe bond between the 2nd and 3rd phosphates in ATP holds a lot of energy.

Aerobic Respiration Requires OxygenMany ATP molecules are made by the mitochondria from the glucose.

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Label the parts of the mitochondrionIntermembrane space

3 Steps to Cellular RespirationBreaking the bonds of Glucose for ATPGlycolysis: Occurs in the cytoplasm No O2 required2 madeKrebs or Citric Acid Cycle:Occurs in the matrixCO2 gas is released here2 madeElectron Transport ChainOccurs in the folds of the inner membrane (crista)Uses O2 and about 32 and water is made.ATPATPATP6Glyco lysis literally means sugar splittingBreaking the First Bond of Glucose: Glycolysis7PPAnytime bonds break, energy is released. Energy carriers can capture some of that energy. The remainder is released as heat.NAD+NAD+NADHNADHNADH= +28PPWhen bonds break, ATP can be made from that energyADPADPATPATPATP= +2These smaller sugar molecules made from glycolysis are called PyruvateJust observe what happens next.9The Krebs Cycle takes place in the Matrix of the Mitochondrion, where more bonds are broken.NAD+NAD+NADHNADHFood for thought what gas am I?The CO2 that gets exhaled10Citric AcidThe Krebs Cycle takes place in the Matrix of the Mitochondrion, where more bonds are broken.11NAD+NADHThe Krebs Cycle takes place in the Matrix of the Mitochondrion, where more bonds are broken.12NAD+NADHThe Krebs Cycle takes place in the Matrix of the Mitochondrion, where more bonds are broken.13PADPATPNADHNAD+The Krebs Cycle takes place in the Matrix of the Mitochondrion, where more bonds are broken.14FADHFADH2The Krebs Cycle takes place in the Matrix of the Mitochondrion, where more bonds are broken.15What is gained per glucose molecule during the Krebs Cycle?NADH = +4FADH2 = +1But there were two molecules of pyruvate that entered the Krebs Cycle How many would actually be produced in this case?+8+2Energy CarriersATP = +1

+2What kind of waste was made in the Krebs cycle?6 CO2 gas!

16Where is the Electron Transport Chain?Inside the mitochondrion. Folds of the inner membrane known as cristae.Many ATP molecules willbe produced in these Electron Transport ChainsWhat are the energy carriers NADH and FADH2 for?They power the Electron Transport Chain that make a lot of ATP!17FADH2NADHFADH2FADH2ATPATPATPATPATPDuring this process, oxygen gas is used, LOTS of ATP is made, and water is created.6 O218

NADHNADH and FADH22 ATP2 ATP34 ATPElectron Transport Chain19Cellular Respiration Equation:

C6H12O6 + 6O2 6CO2 + 6H2O + 36 ATP (Glucose)Light Reactions 20With a neighbor, fill in the steps in this cycle of Photosynthesis and Respiration.We will check your answers when you are done!

Photosynthesis and Respiration21

Fermentation: Anaerobic Respiration Occurs when there is not enough oxygen to sustain an activity, so ATP cannot be made in the mitochondria.Two basic types:Lactic Acid Fermentation (in animals)Alcohol Fermentation (in micro-organisms such as yeast)Fermentation keeps glycolysis going, so at least 2 ATPs can still be made, until oxygen levels are restored.Glycolysis22

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