Cellular Respiration

Cellular Respiration Who? All eukaryotic cells Purpose? Convert food (such as glucose) into ATP 1 glucose = 36 ATP Aerobic process: reaction requires O2 Exothermic reaction: reaction that releases heat

Step 1: Glycolysis Where? In the cell’s cytoplasm What happens? Mitochondrion Glucose C6H12O6 C C ATP ATP C C En-zyme C C C C C Where? In the cell’s cytoplasm What happens? A) Glucose (from our food) is broken down B) 2 ATP molecules released for cellular processes C) Broken pieces of glucose (pyruvate) enter mitochondrion

Step 2: Kreb’s Cycle ATP ATP Mitochondrion En-zyme ATP CO2 C C CO2 C CO2 Energy molecule ATP CO2 C CO2 C En-zyme CO2 C Where? The matrix (fluid enclosed by inner membrane) What happens? A) Enzymes break apart the glucose fragments B) 2 ATP & CO2 created C) Energy molecules sent to inner mitochondrion membrane

Step 3: Electron Transport Chain ATP ATP ATP Mitochondrion P O2 En-zyme ADP ATP O2 Energy molecule ATP ATP ATP H2O ATP H2O H2O H2O ADP P ADP O2 P P O2 ADP O2 Where? Inner mitochondrion membrane What happens? Mitochondrion takes in oxygen (aerobic) Enzymes + Energy molecule + O2 bonds ADP + P to create…. Up to 34 ATP molecules C) O2 bonds with H left over from energy molecule H2O created as waste

Review Which molecule is the energy molecule of cells? Which types of organisms perform cellular respiration? Where does glycolysis occur? What is broken down during glycolysis? What is created as a result of glycolysis? Where is aerobic respiration performed? Name the 2 stages of respiration that take place in the mitochondria. Which waste gas is created by the Kreb’s cycle? What molecule is created as a waste by the “ETC”? How many ATP molecules are made during glycolysis? How many ATP molecules are made during Kreb’s cycle? How many ATP molecules are made during “ETC”? How many ATP molecules are made in total?

Review Answers Which molecule is the energy molecule of cells? Which types of organisms perform cellular respiration? Where does glycolysis occur? What is broken down during glycolysis? What is created as a result of glycolysis? Where is aerobic respiration performed? Name the 2 stages of respiration that take place in the mitochondria. Which waste gas is created by the Kreb’s cycle? What molecule is created as a waste by the “ETC”? How many ATP molecules are made during glycolysis? How many ATP molecules are made during Kreb’s cycle? How many ATP molecules are made during Electron transport chain? How many ATP molecules are made in total? ATP Eukaryotes Cell’s cytoplasm Glucose 2 ATP and 2 3-carbon molecules (pyruvate) Mitochondria The Kreb’s Cycle & The Electron Transport Chain CO2 H2O 2 ATP 2 ATP Up to 34 ATP molecules Up to 38 ATP molecules

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