Mitochondria
Electron Carriers
0A Hydrogen has 1 electron and 1 proton
0Gaining a hydrogen means gaining
electrons and protons
0NAD.
NADH
0FAD.
FADH2
0These can be reused
Why do we need oxygen?
0Aerobic=with oxygen
0An=without
0Anaerobic=without oxygen
0Our body needs oxygen to
produce large amounts of ATP
Cellular Respiration
0Three steps
0Glycolysis
0Krebs cycle (citric acid cycle)
0Electron transport chain
Glycolysis
0Located in cytoplasm of cell
0Input: 1 molecule of Glucose
0Product: 2 Pyruvate
02 ATP
0Overview: 1 molecule of Glucose is
broken down into 2 Pyruvate
molecules. No Oxygen is needed for
Glycolysis to occur.
Krebs Cycle
0 Located: Matrix of Mitochondria
0 Input: 2 Pyruvate, NAD, FAD
0 Output: 6 CO2, NADH, FADH2
0 Produces 2 ATP
0 Overview: the 2 Pyruvate are changed
into Acetyl COA before entering the Krebs
Cycle. The Acetyl is changed into Citric
Acid. Electron carriers pick up the extra
Hydrogen atoms as the molecule is
broken down and moves toward the ETC.
Electron Transport Chain
0 Located in the inner membrane (Christae) of the
mitochondria
0 Input: NADH, FADH2, O2
0 Output: NAD, FAD, H2O
0 Produces 34 ATP
0 Overview: the electron carriers donate the hydrogen into
enzymes located in the membrane. The electrons move
into the membrane while the protons are pushed through
the membrane. At the end of the chain the protons push
back through an enzyme which powers phosphate to
attach to ADP to make ATP.
Cellular Respiration Equation
0C6H12O6+O2.
H2O+ATP