1. Cellular Respiration

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

3. Step 1: Glycolysis Where? In cytoplasm What happens?
Mitochondria
Glucose
C6H12O6 C C
ATP
ATP C C
En-zyme C C C C C
Where? In cytoplasm
What happens?
A) Glucose (from our food) is broken down
B) 2 ATP molecules released for use by the cell
C) Broken pieces of glucose enter mitochondria
Glycolysis means sugar breaking
Broken into pieces of pyruvic acid, a 3 carbon compound Glycolysis requires ATP
Product of Glycolysis NADH, Pyruvic Acid, ATP

4. Summary of Glycolysis
*.Glucose broken into 2 pieces called
Pyruvic Acid.
.* Glycolysis requires ATP
* does not require oxygen
*Products: ATP, Pyruvic Acid, NADH

5. Step 2: Kreb’s Cycle Where? Inner mitochondria layer What happens?
ATP
ATP
Mitochondria
En-zyme
ATP
CO2 C
CO2 C C
CO2
Energy molecule
ATP C
CO2
CO2 C
En-zyme
CO2 C
Where? Inner mitochondria layer
What happens?
A) Enzymes break apart the glucose into CO2 fragments
B) 2ATP & CO2 created
C) Energy molecules sent to fluid interior of mitochondria
Sometimes Krebs Cycle called the citric acid cycle because citric acid was first compound formed in series of action
Krebs Cycle occurs in matrix of mitochondria
Produces carbon dioxide
aerobic

6. Step 3: Electron Transport Chain
ATP
ATP
ATP
Mitochondria P O2
En-zyme
ADP
ATP O2
Energy molecule
ATP
ATP
ATP
ATP
ADP P
ADP O2 P P O2
ADP O2
Where? Interior mitochondrial membrane
What happens?
Mitochondria takes in oxygen (aerobic)
Enzymes + Energy molecule + O2 bonds ADP + P to create…. 32 total ATP’s
36 total production

7. 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?
How many ATP molecules are made during glycolysis? Kreb’s cycle? Electron transport chain? In total?