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Cellular Respiration

Cellular Respiration. C onverts sugar into ATP using oxygen. ATP = A denosine T ri p hosphate. Adenosine. P. P. P. What is it? Energy molecule How store energy? Energy stored in chemical bonds Energy is released when ATP is broken into ADP Why needed?

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Cellular Respiration

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  1. Cellular Respiration Converts sugar into ATP using oxygen

  2. ATP = Adenosine Triphosphate Adenosine P P P • What is it? • Energy molecule • How store energy? • Energy stored in chemical bonds • Energy is released when ATP is broken into ADP • Why needed? • ATP used for cellular activities • ATP recreated when ADP + P rejoined Adenosine P P P Energy (heat)

  3. Cellular Respiration • Who: All cells • Purpose: Break food into useable molecules to create ATP • 1 glucose = 36/38 ATP (carbs = preferred source) • Exothermic reaction: reaction that releases heat

  4. Step 1: Glycolysis • In cytoplasm of cell • Anaerobic process (does not require oxygen) • What happens? • Glucose (from our food) is broken down • How it happens? • 2 ATP split glucose into 2 three-carbon molecules called pyruvate • 2 ATP molecules released for use by the cell • Pyruvate enters mitochondria

  5. Step 1: Glycolysis Mitochondria C ADP • In cytoplasm • What happens? • Glucose (from our food) is broken down • 2 ATP molecules released for use by the cell • Broken pieces of glucose enter mitochondria ADP C P ATP ATP C C glucose P C P ADP C P ADP P ADP ADP P P

  6. 1 ATP mitochondrion matrix (area enclosed by inner membrane) and 6CO 2 energy 2 3 energy from glycolysis ATP inner membrane and and 6H O 6O 2 2 4 Cellular respiration is like a mirror image of photosynthesis • The Krebs cycle transfers energy to an electron transport chain: • takes place inmitochondrial matrix • breaks down pyruvatemolecules from glycolysis • makes a small amount of ATP • releases carbon dioxide • transfers energy-carrying molecules to the electon transport chain Krebs Cycle

  7. 1 ATP mitochondrion matrix (area enclosed by inner membrane) and 6CO 2 energy 2 Electron Transport 3 energy from glycolysis ATP inner membrane and and 6H O 6O 2 2 4 • The electron transport chain produces a large amount of ATP. • takes place in inner membrane • energy transferred to electron transport chain • oxygen enters process • ATP produced • water released as awaste product

  8. Step 2: Aerobic Respiration Mitochondria P ADP C ADP O2 C P • In mitochondria • Two separate processes: Kreb’s cycle & Electron Transport Chain • Mitochondria takes in oxygen • Oxygen bonds the ADP + P into ATP (up to 36 ATP’s) • CO2 waste created C O2 O2 P ADP ATP P C CO2 O2 ATP P CO2 C O2 O2 ADP ATP CO2 C ADP ADP P

  9. REview • Which molecule is the energy molecule of cells? • Which types of organisms perform cellular respiration? • What is the chemical equation of cellular respiration? • Where does glycolysis occur? • What is broken down in glycolysis? • What is created by glycolysis? • Where is aerobic respiration performed? • Name the 2 subcategories of aerobic respiration. • What is the point on aerobic respiration? • Which waste is created by aerobic respiration?

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