1. Cellular Respiration

2. 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

3. 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

4. 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

5. 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

6. 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?

7. 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

8. 14)